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After: Zac Efron He still likes to take a risk with his hair every now and then. Case in point: When he arrived at the premiere of his film Extremely Wicked Shockingly Evil with platinum blonde hair and a dark brown beard. George Pimentel - Getty Images

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Before: Brad Pitt During the mid-nineties, Brad Pitt embraced the grunge aesthetic with a long, beach blonde style. Jim Smeal - Getty Images

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After: Brad Pitt But when he showed up to the 52nd annual Golden Globes in 1995, his long hair was gone. He debuted a sleeker, spikier cut on the red carpet. Ron Galella, Ltd. - Getty Images

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Before: Kit Harrington Kit Harrington has rocked his character's signature scruffy look since he rose to fame playing Jon Snow on HBO's Game of Thrones in 2011. Kevin Mazur - Getty Images

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After: Kit Harrington Rather symbolically, the actor arrived to the final premiere of Game of Thrones sporting a freshly shaven and clean-cut look. Long live the King of the North! Jeff Kravitz - Getty Images

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Before: David Beckham David and Victoria Beckham were the picture-perfect couple in the early 2000s, complete with their matching pixie cuts and side swept bangs. Dave Hogan - Getty Images

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After: David Beckham Beckham shocked fans by shaving off his signature style before a Carling Cup match in March 2000. The result was a close buzz cut that was covered extensively by press. Mike Hewitt - Getty Images

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Before: Taylor Kitsch It was Taylor Kitsch's long hair that made teenage girls swoon for his bad boy character, Tim Riggins, on Friday Night Lights. Jon Kopaloff - Getty Images

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After: Taylor Kitsch But after the show's final season, Kitsch buzzed off the long hair that made him famous to prepare for his next role in John Carter. Alberto E. Rodriguez - Getty Images

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Before: Jared Leto Although not his first iconic hairstyle (remember his My So-Called Life look?), Jared Leto's long flowing beach waves are certainly his most signature look. Kevin Mazur - Getty Images

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After: Jared Leto Leto ditched his long hair for a short platinum cut for his role as The Joker in Suicide Squad. He debuted the bold look at Paris Fashion Week in 2015. Dominique Charriau - Getty Images

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Before: Justin Timberlake Justin Timberlake rocked both frosted tips and blonde curls while singing in the '90s boy band, NSYNC. Sam Levi - Getty Images

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After: Justin Timberlake In 2001, Timberlake shaved off his iconic curls in favor of a more modern combination: a buzz cut and goatee. Dave Hogan - Getty Images

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Before: Jonah Hill Jonah Hill has been associated with his short curly hair and scruff since he entered the comedy world with a bang thanks to Superbad. Andrew Toth - Getty Images

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After: Jonah Hill Hill surprised everyone by bleaching his hair platinum blonde in 2018. He even experimented with pink dye for a bit, but has since gone back to his roots. Paul Archuleta - Getty Images

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Before: Snoop Dogg Snoop Dogg frequently sported an afro during the '90s. Brian Rasic - Getty Images

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After: Snoop Dogg The rapper made headlines when he arrived at the 1994 MTV Music Awards wearing his hair in curls. Mitchell Gerber - Getty Images

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Before: Leonardo DiCaprio At the beginning of his career, Leonardo DiCaprio was known for his blonde floppy hair. It was even the style he sported while filming Titanic. Terry McGinnis - Getty Images

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After: Leonardo DiCaprio But when DiCaprio arrived at the premiere of Titanic, his famous Jack Dawson look had been replaced with a new short and spiky haircut. HAL GARB - Getty Images

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Before: Zayn Malik For years, Zayn Malik favored an edgy cut that was long on top and shaved on the sides. Steve Granitz - Getty Images

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After: Zayn Malik In 2018, the singer dyed his freshly trimmed hair an electric blue and pink. Raymond Hall - Getty Images

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Before: Jude Law Jude Law perfected his signature floppy hair at the beginning of his career, which he was known for. Ronald Siemoneit - Getty Images

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After: Jude Law However, it was suddenly absent when he walked the red carpet of AI: Artificial Intelligence in 2001. The actor opted for a buzz cut and has played around with his hair since. Carmen Valdes - Getty Images

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Before: Adam Levine Adam Levine has styled his dark brown hair long on top with a close crop on the sides for yearsand given his rockstar status, we'd expect nothing less. NBC - Getty Images

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After: Adam Levine The Maroon 5 singer swapped out his dark hair for a platinum blonde color in 2017. Tim Mosenfelder - Getty Images

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Before: Justin Bieber Justin Bieber's side swept bangs became the most popular haircut in 2009 as Bieber-fever took over America. Ethan Miller - Getty Images

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After: Justin Bieber In 2012, Bieber debuted a shorter hairstyle that separated him from his baby face teen image. Jeff Kravitz - Getty Images

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Before: Niall Horan The One Direction singer rocked blonde hair since the boy band was formed on The X Factor. Karwai Tang - Getty Images

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After: Niall Horan Niall tried out a new brown hair color to accompany his blossoming solo career in 2017. David M. Benett - Getty Images

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Before: Robert Pattinson Robert Pattinson fueled the fans of Twilight-mania with his infamous bedhead style. The messier, the better. Jason LaVeris - Getty Images

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After: Robert Pattinson At the end of the franchise, the actor chopped off his messy mane. Don't worry, the fans weren't disappointed by his new buzz cut. Francois G. Durand - Getty Images

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Before: Ryan Gosling Ryan Gosling rocked the same short sandy blonde hair for years, including for movies like The Notebook and Crazy, Stupid Love. Jim Spellman - Getty Images

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After: Ryan Gosling But while filming The Place Beyond the Pines, Gosling bleached his hair platinum blonde for the role. Christopher Peterson - Getty Images

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Before: Joe Jonas Joe Jonas made straight, shaggy hair his signature style while singing in the Jonas Brothers on the Disney Channel. Scott Gries - Getty Images

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Joe Jonas: After After the band broke up in 2013, Jonas switched up his hairstyle to match his new rock band, DNCE. JOHN THYS - Getty Images

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Before: Ryan Lochte The Olympic swimmer kept his brown hair short and trimmed while training for the summer Olympics. Harry How - Getty Images

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After: Ryan Lochte Lochte surprised everyone when he debuted ice blue hair in the press conference before the 2016 Rio Olympics. Clive Rose - Getty Images

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Before: Jake Gyllenhaal Jake Gyllenhaal has perfected the clean cut look throughout his career. Steve Granitz - Getty Images

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After: Jake Gyllenhaal However, in 2012 he embraced the scruffy look when he let his beard and mane grow out. D Dipasupil - Getty Images