Celebrities who dated before they were famous

Diane Lane and Jon Bon Jovi - The two dated back in the '80s, when Jon Bon Jovi still had long hair, and Diane Lane wasn't the famous actress she is today.

George Clooney and Kelly Preston - George Clooney and the late Kelly Preston dated from 1987 to 1989.

Scarlett Johansson and Jack Antonoff - The two attended the Professional Children’s School in New York City and even went to prom together! The relationship lasted two years.

Ashton Kutcher and January Jones - Ashton Kutcher and January Jones dated from 1998 to 2001, before both were known in Hollywood.

Justin Timberlake and Fergie - The two dated in 1997, even before NSYNC's first album came out. Justin Timberlake was 16 and Fergie 23 back then.

Reese Witherspoon and Chris O'Donnell - Reese Witherspoon and Chris O'Donnell dated back in 1993. The actress was just 16.

Michael Keaton and Courteney Cox - The couple dated back in the late '80s, before Courteney Cox became a star on 'Friends.' They eventually split up in 1995.

Ryan Reynolds and Kristen Johnston - Ryan Reynolds and Kristen Johnston of '3rd Rock from the Sun' fame dated back in 1999, before Reynolds became the movie star he is today.

Matthew Morrison and Lea Michele - Matthew Morrison and Lea Michele dated while working on Broadway, before they both landed roles on the hit TV show 'Glee.'

Leighton Meester and Sebastian Stan - The couple started dating in 2008, right at the beginning of 'Gossip Girl,' and before Sebastian Stan starred in movies from the Marvel Cinematic Universe.

David Gallagher and Megan Fox - In 2003, the teen heartthrob dated Megan Fox before she become a famous Hollywood bombshell.

Minka Kelly and Donald Faison - Minka Kelly and Donald Faison dated before their successful roles in 'Scrubs' and 'Friday Night Lights.'

Katy Perry and Travie McCoy - Before global stardom, Katy Perry started dating fellow music artist Travie McCoy in 2006. The two eventually broke up in December 2008.

Jessica Biel and Chris Evans - Jessica Biel and Chris Evans dated on-and-off from 2001 to 2005. Back then, they were nowhere near as famous as they are today.

Sandra Bullock and Tate Donovan - The two met on the set of 'Love Potion No. 9' in 1990 and were together up until 1994.

Jon Hamm and Jennifer Westfeldt - The two dated back in 1997, before the successes of 'Kissing Jessica Stein' and 'Mad Men.'

Alanis Morissette and Ryan Reynolds - Ryan Reynolds dated singer Alanis Morissette for quite some time. The Canadian couple were even engaged in 2004, but eventually split up in 2008.

Mila Kunis and Macaulay Culkin - The two started dating in 2002, when Kunis was not that famous, and the 'Home Alone' star's fame went downhill. The relationship lasted eight years.