President Donald Trump is a fan, and considered her for the role as White House communications director. Before that, she was once first lady of San Francisco when her first husband was mayor.
Frequently appearing on the Manhattan scene over the last decade, Guilfoyle is now dating Donald Trump Jr. amid his public divorce from his wife, Vanessa Trump .
Here is an inside look at the rise of Guilfoyle, from lawyer to Republican booster.
Guilfoyle was born in San Francisco on March 9, 1969. Her father had a career in construction, and raised Guilfoyle and her brother as a single dad after her mom died of leukemia when she was 11.
Guilfoyle graduated Magna Cum Laude from UC Davis and received her law degree from the University of San Francisco. She interned for the San Francisco district attorney, and modeled for Macys and Victorias Secret while she was in law school.
After graduating law school, Guilfoyle worked as a prosecutor in San Francisco before spending four years in Los Angeles as a deputy district attorney. She then returned home to San Francisco where she served as assistant district attorney for four years.
In 2004, Guilfoyle moved to New York City to pursue a career on television. She hosted the program "Both Sides" on Court TV and served as a legal analyst for CNN.
Guilfoyle married Gavin Newsom in 2001. Two years later, he was elected mayor of San Francisco, and she became the citys first lady.
But as their bi-coastal marriage became a strain and Guilfoyle focused on her television career, the couple filed for divorce in 2005. Newsom, a Democrat, served as lieutenant governor of California from 2011 until he was elected governor in 2018.
In 2006, Guilfoyle married Eric Villency in Barbados and later gave birth to a son. Villency, a former model, is CEO of an interior design firm in New York who sometimes appears as a guest on TV news programs like the "Today Show."
Three years later, the couple separated and eventually divorced.
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Guilfoyle joined Fox News in 2006 as a host of the weekend show "The Lineup".
After the show was canceled, Guilfoyle remained with the network as a legal analyst and became a co-host of "The Five" in 2011.
She served in the same position for several years. Guilfoyle has also appeared on "The OReilly Factor", "Hannity", and "Fox and Friends". In 2017, she signed a long-term extension with Fox News.
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Guilfoyle put down permanent New York roots in 2014, when she bought a $3.4 million, 2-bedroom apartment on the Upper West Side. It was filled with taxidermied animals, but shes since transformed the space. Jerry Seinfeld reportedly lives in the building, too.
In 2015, Guilfoyle wrote a semi-autobiographical book called "Making the Case: How to Be your Own Best Advocate" on her experience as a prosecutor and encouraging others to always stand up for themselves.
When former Fox News host Gretchen Carlson accused former Fox News chief Roger Ailes of sexual harassment, Guilfoyle disputed the charges and came to her bosss defense.
In December 2016, Trump was reportedly considering Guilfoyle to be his press secretary.
In 2017, it was rumored that Guilfoyle was dating Anthony Scaramucci, the financier who served as Trumps White House communications director for 10 days.
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After Sean Spicer resigned in July, Guilfoyle said she was in conversations with Trump to succeed Spicer in the role. She was ultimately not selected for the job.
In May, rumors swirled that Guilfoyle was dating Trump Jr., who is nine years her junior. Page Six reported that the TV personality and presidents first-born had been dating for weeks, and that theyd been spotted out together in New York.
AP; Invision; Business Insider/Rebecca Harrington
In June 2018, the couple made things Instagram official, both posting photos vacationing together in Montana and at a Poison concert.
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Guilfoyle left Fox News in July 2018.
She joined Trump Jr. on the campaign trail and picked up the vice chairwoman role at America First Policies, a pro-Trump nonprofit.
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Guilfoyle made frequent rally appearances by Trumps side in the months leading up to the November midterms.
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By Christmas, Guilfoyle was a regular fixture at Trump family appearances, even attending the 96th annual National Christmas Tree Lighting Ceremony seats away from President Donald and first lady Melania Trump.
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In February 2019, Guilfoyle attended New York Fashion Week and posed with the presidents ex-wife Marla Maples and her daughter Tiffany at the Taoray Wang show.
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It looks like Guilfoyles star power is just going to keep rising from here.
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