In September, the pair quietly tied the knot at a courthouse in New York City.
But before all this, the pair was romantically linked in 2015 and 2016 and have known one another since 2009 .
Sounds confusing? Well, it is. Here's a complete timeline of Bieber and Baldwin's surprisingly serpentinerelationship.
2009: Bieber and Baldwin met at a fan event.
According to 234Star.com , Bieber and Baldwin first met at a fan event (for Bieber, not Baldwin) in 2009 . Baldwin, who was 12 at the time, was there with her father Steve Baldwinand kept her arms firmly crossed throughout their entire encounter. Love did not exactly seem to be in the air, but a lot can change in nine years.
February 2011: Baldwin attended another Bieber event.
Michael Loccisano/Getty Images
Steve Baldwin brought his daughter to the New York City premiere of "Never Say Never" in 2011.
"I was never a superfan, of him or of anyone," Baldwin later explained in an interview with Vogue . "It was never that crazed, screaming thing. I didn't think about it in any kind of way except for the fact that he was cute. Everybody had a crush on him. But for the first few years we had a weird age gap."
November 2014: Bieber and Baldwin went to church together.
In November 2014, Bieber and Baldwin were spotted together at Hillsong church (with Kendall Jenner ), which sparked speculation that they were dating. Around the same time, Bieber had broken up with his on-again, off-again girlfriend, Selena Gomez . This was not Bieber and Gomez's first breakup, and it wouldn't be their last.
December 2014: Bieber and Baldwin fended off dating rumors.
After being seen together at church, Bieber and Baldwin denied any romantic involvement. In an interview with E! News, Baldwin said, "I've known [Bieber] since I was so young since I was like 13 and we've just been good friends over the years . We have just stayed close and there's nothing more to it than that."
Bieber voiced a similar sentiment on Instagram when he shared a photo of he and Baldwin captioned, "People are crazy. I'm super single and this is my good friend u would know otherwise."
January 2015: Bieber and Baldwin celebrated New Year's Eve.
Bieber and Baldwin managed to maintain their friendship in the face of relationship rumors and celebrated the start of 2015 together. Bieber even posted a video of a party they attended.
July 2015: Bieber and Baldwin got matching tattoos.
In the summer of 2015, Bieber and Baldwin got matching "G" tattoos. According to Cosmopolitan, these tattoos were in honor of pastor Chad Veach's daughter, Georgia , who was born with Lissencephaly, a rare condition characterized by a lack of folds in the brain .
December 2015: Baldwin went on vacation with Bieber's family.
Throughout the tropical vacation, Bieber posted a flurry of photos with Baldwin, his father, and his siblings including one fan-favorite video of Bieber teasing Baldwin while she poses for the camera.
January 2016: Bieber and Baldwin spent another New Year's Eve together but in a more romantic way.
Bieber and Baldwin spent the start of 2016 together in St. Barts, where, according to People, they exchanged a New Year's kiss at Leonardo DiCaprio's New Year party .
February 2016: Bieber and Baldwin discussed their relationship.
Jason Merritt/Frederick M. Brown/Getty Images
Bieber and Baldwin kinda-sorta confirmed their relationship in separate interviews after ringing in 2016 together. In an interview with GQ,Bieber said that Baldwin is someonewho he "really love[s],"but also said that he didn't want to "commit" to anything .
Baldwin also confirmed that she and Bieber were dating, but not official, around the same time.
" We are not an exclusive couple . He's about to go on tour," she told E! News. "Relationships at this age are already complicated, but I don't really like to talk about it because it's between me and him."
Clearly, both Bieber and Baldwin tried to avoid saying that they were officially dating. But Bieber also hinted that he might like to marry Baldwin one day , saying, "I know that in the past I've hurt people and said things that I didn't mean to make them happy in the moment. So now I'm just more so looking at the future, making sure I'm not damaging them. What if Hailey ends up being the girl I'm gonna marry, right?"
Sometime between February and August 2016, the two fell out.
Baldwin later told Vogue that, while she understood their relationship was not serious or exclusive, things ended very badly between them.
"Negative things happened that we still need to talk about and work through," she said in an interview published January 2019.
"'Fizzled' would not be the right word it was more like a very dramatic excommunication. There was a period where if I walked into a room, he would walk out."
August 2016: Bieber started dating Sofia Richie.
Whatever had been going on between Bieber and Baldwin in early 2016 was over by August of that year, when Bieber unfollowed Baldwin on Instagram and started dating Sofia Richie .
Bieber and Richie didn't date for very long in fact, they were broken up by September but Bieber and Baldwin's friendship remained in limbo for almost two years.
November 2017 March 2018: Bieber rekindled his relationship with Selena Gomez.
Stuart Franklin/Getty Images/Christopher Polk/Getty Images
Shortly after Bieber was spotted out and about with model slash actress Paola Paulin , he reportedly drove to Gomez's house to hang out with other friends for an evening (while Gomez's boyfriend at the time, Abel Tesfaye aka The Weeknd, was on tour).
After Gomez and The Weeknd split, she was spotted cheering for Bieber at a hockey game in Los Angeles while wearing his jersey. Us Weekly quickly confirmed that the on-and-off couple were back together once again .
Bieber and Gomez called it quits for the last time in March 2018 , four months after their reunion, as reported by E! News.
May 5, 2018: Baldwin attended the Met Gala with Shawn Mendes.
Jamie McCarthy/Getty Images
Baldwin attended the 2018 Met Gala with singer Shawn Mendes, who helped make sure her dress looked great the whole night .
This sparked some dating rumors between the two, which both Baldwin and Mendes denied.
Months later, Mendes admitted that the two were "more than friends," but not technically in a relationship: "I don't even wanna put a title on it. I think it was more of a zone of limbo," he told Rolling Stone.
June 2018: Bieber and Baldwin reconnected.
According to the couple's interview with Vogue , they finally reclaimed their relationship when they both attended a conference in Miami hosted by pastor Rich Wilkerson Jr.
"The common denominator, I promise you, is always church," Baldwin told Vogue. "By then we were past the drama. I just gave him a hug. By the end of the conference, he was like, 'We're not going to be friends.' I was like, 'We're not?'"
June 2018: They became the king and queen of PDA.
Throughout the month of June, Bieber and Baldwin embarked on a public unconfirmed-relationship tour unlike any other.
July 8, 2018: Bieber and Baldwin reportedly got engaged.
On July 8, while on vacation in the Bahamas, Bieber reportedly proposed to Baldwin. Fan photos revealed that Baldwin had begun wearing a massive diamond on her left ring finger.
Steve Baldwin also appeared to be proud, as he tweeted and then deleted a cryptic tweet about husbands and wives .
July 9, 2018: Bieber confirmed his engagement to Baldwin.
On Monday, Bieber posted an Instagram photo with Baldwin in which hecalled her the "love of my life"and confirmed the engagement.
"Was gonna wait a while to say anything but word travels fast, listen plain and simple Hailey I am soooo in love with everything about you!" he wrote. "So committed to spending my life getting to know every single part of you loving you patiently and kindly."
According to Entertainment Tonight, the ring is large and oval-cut .
July 17, 2018: Baldwin's bridal party was partly announced.
Grant Lamos IV/Getty Images
A date for Bieber and Baldwin's wedding was still up in the air, but plans for the event already appeared to be in the works at least as far as Baldwin's bridal party was concerned.
On Tuesday, Kim Basinger told Us! Weekly that Baldwin's sister Alaia and cousin (and Basinger's daughter) Ireland are going to be in the wedding .
"Alaia and Ireland, they're in the wedding. So believe me, I just it's cool!" Basinger told Us! Weekly. "I think it's sweet. It's a very sweet thing."
Basinger married Baldwin's uncle, Alec Baldwin , in 1993. The couple divorced in 2002.
July 29, 2018: Bieber implied that the wedding would be soon.
Bieber and Baldwin were out and about in New York City when a TMZ cameraman asked Bieber what might be next for him .
The question might have been directed towards his career Bieber just released a new song with DJ Khaled but Bieber took a personal route and responded,responded, "What's next? Getting married."
As Cosmopolitan reported, Bieber and Baldwinwere spotted meeting with a pastor around the same time . Baldwin was carrying a notebook during the meeting, which seems to indicate that their wedding planning is progressing rapidly.
August 2018: Baldwin flaunted her stunning engagement ring on the cover of Vogue Mexico.
The stunning cover shot, taken by photographer Bjorn Iooss , shows Baldwin draping her right hand towards the camera to show off her sparkling ring.
Gemologist and diamond expert Grant Mobley told INSIDER that the ring has an estimated cost of $600,000 and appears to be about eight carats.
Bieber worked with New York-based jeweler Jack Solow of Solow & Co. to design the ring, and the jeweler told People that Bieber was very hands-on with the process .
"In the end, Justin wanted something that would gracefully accentuate Hailey's beautifully shaped hands," Solow told People. "We settled on an oval stone that was just exceptional in its length and grace."
Sometime in September 2018, the couple moved in together.
James Devaney/GC Images
According to an interview with Vogue , published in January 2019, Baldwin moved into Bieber's home just outside Toronto in September. The magazine also reports that they quickly began "squabbling over decorating decisions."
September 13, 2018: Bieber and Baldwin were reportedly spotted at a New York City courthouse where marriage licenses are issued.
TMZ reported that "several eyewitnesses" spotted the happy couple at the Marriage Bureau in New York City and that Bieber seemed "emotional."
According to the anonymous eyewitnesses, Bieber shed some tears and even told Baldwin, "I can't wait to marry you, baby."
Vogue later confirmed that the two tied the knot at the courthouse .
September 14, 2018: Baldwin denied reports that she and Bieber had already gotten married.
Citing anonymous inside sources, People reported that the couple was officially married at the courthouse .
"They went ahead and did it without listening to anyone," a source told People.
According to the outlet, a "religious source" also confirmed that Bieber and Baldwin are now legally married, but are planning to celebrate with friends and families soon.
Baldwin, however, took to Twitter shortly after the news broke and denied the reports : "I understand where the speculation is coming from, but I'm not married yet!"
She later deleted the tweet.
September 18, 2018: Bieber serenaded Baldwin during a loved-up trip to London.
WeirPhotos / SplashNews.com
The couple was in town for London Fashion Week, where model Baldwin attended the Adidas and JD show after collaborating with the brands as their "style creator."
Bieber and Baldwin were trailed by the paparazzi throughout the city as they visited some of its tourist hotspots and the singer was even filmed doing some busking outside Buckingham Palace.
A clip of the singer shows him saying, "That's the love of my life right there," while looking at Baldwin and strumming on his guitar.
An eyewitness told E! News : "They were very affectionate, stopping on street corners to pull each other in close to kiss. They never let each other get too far and were always touching each other and laughing."
September 30, 2018: Bieber introduced Baldwin as his wife.
Bieber and Baldwin paid a visit to theStratford Perth Museum, which is currently hosting an exhibit about Bieber's rise to fame .
The museum's Instagram account posted an image of a message, apparently written to Bieber, that reads: "I you forever Hailey B."
"We were so pleased to have such a warm and special guest visit the museum yesterday (along with her very special husband)," the post's caption reads.
In a comment on the post, the museum further clarified : "Justin very graciously introduced Hailey as his wife. Perhaps just a term of endearment? We loved their visit."
November 15, 2018: Bieber officially called Baldwin his wife on Instagram.
Bieber shared a candid shot with Baldwin using a simple caption: "My wife is awesome."
According to Elle , that wasn't originally the caption of his photo. It was apparently caption-less when he posted it on Instagram.
Fans took the post as an official confirmation of the couple's new relationship status .
November 16, 2018: Baldwin changed her surname on social media to Bieber.
The model, formerly known as Hailey Baldwin, now apparently goes by Hailey Rhode Bieber , Rhode being her middle name.
February 7, 2019: The Biebers appeared together on the cover of Vogue.
"We're coming from a really genuine place," Baldwin said. "But we're two young people who are learning as we go."
"I'm not going to sit here and lie and say it's all a magical fantasy," she continued. "It's always going to be hard. It's a choice. You don't feel it every single day. You don't wake up every day saying, 'I'm absolutely so in love and you are perfect.' That's not what being married is. But there's something beautiful about it anyway about wanting to fight for something, commit to building with someone."
Sara Hendricks contributed reporting to an earlier version of this story.
Visit INSIDER's homepage for more.