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Lisa Kudrow and Conan O'Brien met in an improv comedy class and dated briefly, before they became hugely famous.
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.
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.
The two met on the set of 'Love Potion No. 9' in 1990 and were together up until 1994.
Jennifer Aniston and Tate Donovan met in 1995 and dated for a few years. The two broke up right before the actor had a guest role on 'Friends' as her character's love interest.
The couple dated between 2006 and 2007, just before 'Keeping Up with the Kardashians' became a huge hit.
Source: (Marie Claire)
The two had a "flingy-wingy," as Osbourne called it, after they met one night in a bar. Needless to say, it didn't last.
Sandra Bullock was already famous when she dated Ryan Gosling back in 2002.
Ryan Reynolds dated singer Alanis Morissette for quite some time. The Canadian couple were even engaged in 2004, but eventually split up in 2008.
The two dated back in 1997, before the successes of 'Kissing Jessica Stein' and 'Mad Men.'
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.
Brad Pitt has had many romances, and Lewis was one of them. The two dated back in 1989, when he was 26 and she was just 17. The couple broke up in 1993.
Ashton Kutcher and January Jones dated from 1998 to 2001, before both were known in Hollywood.
Keira Knightley and Jamie Dornan dated in 2003, when Knightley was not the famous actress she is today, and way before Dornan starred in 'Fifty Shades of Grey.'
The two dated in 1997, even before NSYNC's first album came out. Justin Timberlake was 16 and Fergie 23 back then.
Minka Kelly and Donald Faison dated before their successful roles in 'Scrubs' and 'Friday Night Lights.'
The two met on the set of 'Excalibur' in 1981 and dated for five years. They even lived together at one point!
Zooey Deschanel and Jason Schwartzman started dating when they were both 19. They split up in 2005.
Reese Witherspoon and Chris O'Donnell dated back in 1993. The actress was just 16.
The couple dated back in the late '80s, before Courteney Cox became a star on 'Friends.' They eventually split up in 1995.
George Clooney and the late Kelly Preston dated from 1987 to 1989.
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.
In 2003, the teen heartthrob dated Megan Fox before she become a famous Hollywood bombshell.
Busy Phillips and Colin Hanks met at Loyola Marymount University and dated for a while. They remain friends to this day.
Matthew Morrison and Lea Michele dated while working on Broadway, before they both landed roles on the hit TV show 'Glee.'
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.
Before Jennifer Grey's popularity exploded with 'Dirty Dancing,' she dated Matthew Broderick, up until 1987.
The couple started dating in 1984, way before Iron Man and Carrie Bradshaw. Sarah Jessica Parker and Robert Downey Jr. were just 18 back then.
The couple dated back in 1997, when they were both 18. This was just before Jennifer Love Hewitt became famous with 'I Know What You Did Last Summer,' which came out in the same year.
The two attended the Professional Children’s School in New York City and even went to prom together! The relationship lasted two years.
The couple co-starred in 'Felicity' back in 1998 and started dating. They eventually got married in 2000, but it only lasted three years.
Feldman was 18 and Barrymore was 14 when they started dating. Though according to Feldman's memoir, the two went on a date in 1985 when he was 14 and the actress was just 10 years old!
The two started dating when they were students at New York University, way before the 'Veronica Mars' and 'Glee' days.
Before global stardom, Katy Perry started dating fellow music artist Travie McCoy in 2006. The two eventually broke up in December 2008.
Click on and find out who dated who before they were famous.
Celebrities who dated before they were famous
You won't believe some of these couples' stories!
CELEBRITY Couples
Many A-list couples went under the radar for most people, mostly because they were not A-listers back then. What would now be considered celebrity power couples were back then just a couple of budding actors trying to make it in Hollywood, or music artists at the beginning of their careers. The couples in this gallery met and dated before they found fame. And as you'll see, many have become hugely famous!
Click on and find out who dated who before they were famous.