3.Matt LeBlanc's fame skyrocketed when he began starring in Friends...but that wasn't his first role.
He was in a few different music videos in the '90s, but I think my favorite one has got to be starring in Alanis Morissette's 1991 music video for her hit "Walk Away."
6.Jeremy Renner is likely best known for his role as Hawkeye in the Avengers films (and now TV show), as well as his role in the award-winning The Hurt Locker.
Well, before all that, he appeared in P!nk's 2003 music video for "Trouble."
7.We all know fellow Marvel star Sebastian Stan is a heartthrob, but I only just recently learned he's been a heartthrob since wayyy back.
He starred in Hayden Panettiere's music video for her song "Wake Up Call" in 2008. This was three years before he played Bucky Barnes — though he had appeared on Gossip Girl twice for brief guest appearances.
8.Alexander Skarsgård is now a critically acclaimed actor, but back when he was filming the first season of True Blood — the role that would make him famous — he accepted a role in a strange music video with a new artist.
The artist was Lady Gaga, and the music video was 2009's "Paparazzi."
13.Kim Kardashian is now one of the most recognizable faces in the world.
But that wasn't the case back in 2007, when her reality TV show had only just started. In fact, you may have even missed her in Fall Out Boy's music video for "Thnks fr th Mmrs."
15.It's hard to avoid Chrissy Teigen now, but she wasn't always this famous.
She was a successful model, but not as famous as she is now, when she starred in John Legend's "Stereo" music video in 2007. Of course, the two met on set, and ended up getting married and raising a beautiful family.
16.Evan Rachel Wood is famous for so many films and shows, most recently Westworld.
But way back when, she also appeared in Green Day's 2005 music video for "Wake Me Up When September Ends." (Okay, this is two years after her role in Thirteen, but it was so long ago and before her mega-fame that I'm still counting it!)
17.Ana de Armas recently starred alongside then-boyfriend Ben Affleck in the flick Deep Water, as well as appearing in major blockbusters No Time to Die,Blade Runner 2049, and Knives Out in the last five years, catapulting her into fame.
But way back in the day, she was in the music video for the Sidecars' 2009 song "Mundo Fragil."
20.Most of the examples on this list are of stars in music videos as young adults, but Labyrinth star Jennifer Connelly was still a kid in her first music video role.
The video — which was also her first acting role overall — was Duran Duran's "Union of the Snake." The year was 1983, and Jennifer would've been around 12 when it was filmed.
22.Bobby Moynihan is a famous comedian and actor that was on SNL for almost a decade.
But back when Bobby Moynihan was in his first season of SNL as a featured player, he starred as the love interest in Colbie Caillat's 2009 hit "Fallin' for You."
23.ER, Love, Victor, and Divergent actor Mekhi Phifer has definitely been around the block — he has a ton of roles and credits.
But some of his first roles were in '90s music videos. These include "Don't Let Go (Love)" by En Vogue and "Nobody" by Keith Sweat — but most iconic is Brandy and Monica's "The Boy Is Mine" from 1998.
