Before they were household names, some of Hollywood's biggest stars were just roommates, splitting rent and sharing dreams. Here are some of the most iconic celeb roommate pairings who made it big after sharing some very humble beginnings:

Matt Damon & Ben Affleck: The Dynamic DuoLong before winning Oscars for "Good Will Hunting," childhood buddies Matt Damon and Ben Affleck were just two aspiring actors sharing an apartment in Los Angeles, waiting for their big break.

Leonardo DiCaprio & Tobey Maguire: Leo and Tobey have been inseparable since they were kids, and during their early days in Hollywood, they lived together, forming a friendship that’s lasted well beyond their shared digs.

Brad Pitt & Jason Priestley: Before Brad Pitt became one of Hollywood's biggest stars and Jason Priestley joined "Beverly Hills, 90210," these two up-and-coming actors shared an apartment, trying to make it in Tinseltown.

Justin Timberlake & Ryan Gosling: As young stars on "The Mickey Mouse Club," Justin Timberlake and Ryan Gosling shared a house with Timberlake's mom, making their bond as tight as their dance moves.

Judd Apatow & Adam Sandler:  udd Apatow and Adam Sandler once split an apartment while trying to launch their careers, no doubt cracking each other up as they plotted their paths to stardom.

Kiefer Sutherland & Robert Downey Jr.: Kiefer Sutherland and Robert Downey Jr. lived together for three years, supporting each other through the ups and downs of early acting gigs before hitting it big.

Chace Crawford & Ed Westwick: While filming "Gossip Girl," co-stars Chace Crawford and Ed Westwick decided to make things easy—and a lot more fun—by rooming together in New York City.

Lena Dunham & Jemima Kirke: "Girls" Before their hit show "Girls" put them on the map, Lena Dunham and Jemima Kirke were just two friends sharing a Brooklyn apartment, dreaming of their big break.

Ilana Glazer & Rachel Bloom: Before their respective hit shows—"Broad City" and "Crazy Ex-Girlfriend"—Ilana Glazer and Rachel Bloom were just two aspiring comedians splitting rent and making each other laugh.

Penn Badgley & Milo Ventimiglia: Before "Gossip Girl" and "This Is Us" made them stars, Penn Badgley and Milo Ventimiglia lived together, both struggling to find their footing in the acting world.

Dustin Hoffman, Gene Hackman & Robert Duvall: In the early 1960s, struggling actors Dustin Hoffman, Gene Hackman, and Robert Duvall shared an apartment in New York City’s Hell’s Kitchen. They split rent, traded acting tips, and formed a friendship that lasted through decades of fame.

Ed Harris & Mickey Rourke: In the 1970s, Ed Harris and Mickey Rourke were roommates in New York City while attending the Lee Strasberg Theatre and Film Institute. Living together during those formative years helped shape both their impressive careers.

From struggling actors to Hollywood royalty, these stars prove that sharing rent can sometimes be the first step toward sharing the spotlight. Who knew splitting a grocery bill could lead to red carpet glory?