#22. Matthew Morrison & Kristen Bell
Before Bell became Veronica Mars and the voice of Gossip Girl, and before Morrison made a name for himself on Broadway and on Glee, the pair briefly dated.
That's right, these two idols were an item back when they were students at New York University.
#21. William H. Macy & Felicity Huffman
Before they got married on September 6, 1997, the pair dated on-and-off for 15 years! They met in the early 1980s at New York City's Atlantic Theater Company.
Huffman says it was love at first sight, and according to her, she and the Shameless actor bonded over their love for acting.
#20. Michael Keaton & Courteney Cox
During the early-to-mid 80s, Michael Keaton began dating Courteney Cox. You may now know her as Monica Geller, from Friends, but at the time, she was an unknown aspiring actress.
They were together for six years before splitting up in 1995 (which we're still not over, by the way).
#19. David Gallagher & Megan Fox
The young lovers were inseparable when they dated back in 2003. What were the two up to back then?
He was the teen heartthrob from 7th Heaven and she had two film roles to her name, including the 2001 Olsen twins film Holiday in the Sun.
#18. George Clooney & Kelly Preston
We may say that the '80s were a time for future A-Listers to date each other. George Clooney and Kelly Preston dated from 1987 to 1989, and even lived together with Clooney's pet pig Max!
The pair broke up and they eventually found happiness with their respective spouses (Amal Clooney and John Travolta).
#17. Zooey Deschanel & Jason Schwartzman
This was Deschanel's first real relationship. Did you know they were just 19 years old when they started dating?
This was right before her breakout role in Almost Famous and right after Schwartzman'ss role in Rushmore. The couple broke up in 2005.
#16. Reese Witherspoon & Chris O'Donnell
They both may be big stars now, but when these two started to date, they were just two kids trying to make it big in Tinsel Town.
When the couple got together, Witherspoon was only 16 years old, and O'Donnell had just landed his breakout appearances in School Ties and Scent of a Woman.
#15. Angela Bassett & Courtney B. Vance
Before getting romantically together, the American Horror Story star and Vance met in the masters' program at the Yale School of Drama in the '80s and were friends for years. The couple got married in 1997 and welcomed twins in 2006.
Basset told People that he was dating another girl when they studied together. Some years later, they run into each other, they were both single, and the rest is (a love hi)story...
#14. Liam Neeson & Helen Mirren
Shocker, right? After meeting on the set of Excalibur, in 1981, the Taken actor and the Oscar-winner actress dated for five years.
"I remember being on the set and standing with Ciarán Hinds as Helen walked towards us dressed in her full Morgana Le Fey costume and we both went, 'Oh [expletive]' and I was smitten", the actor recalled in a recent interview.
#13. Busy Philipps & Colin Hanks
Before they were famous, the pair attended Loyola Marymount University. Even though they are no longer together, they remain good friends.
They are so close, that they go on family vacations together! The couple dated for a long time and they were still together when they landed their first roles.
#12. Minka Kelly & Donald Faison
Donald Faison was already a star, thanks to Scrubs. Minka Kelly, however, was just taking her first steps into acting. The two of them were never shy about being seen together in public.
They are so close, that they go on family vacations together! The couple dated for a long time and they were still together when they landed their first roles.
#11. Justin Timberlake & Fergie
The singers used to be a thing before NSYNC and The Black Eyed Peas were famous in the music industry. Fergie was 23, and Justin was 16 at the time.
While after their short affair, Justin began dating Britney Spears and ended up marrying Jessica Biel (another member of our list!), Fergie started a family with Josh Dushamel.
#10. Keira Knightley & Jamie Dornan
When Keyra Knightley was known for roles in Star Wars: Episode 1 - The Phantom Menace and Bend It Like Beckham, and far from the mega star she is today, she used to date Jamie Dornan.
At the time, Dornan was a Calvin Klein model. After dating for two years, the couple broke up in 2005, a year before Dornan's first film credit.
#9. Ashton Kutcher & January Jones
Before landing several roles on both the small and the big screen, Kutcher and Jones dated from 1998 to 2001.
According to her, the actor was not very supportive of her acting career, and didn't think that Jones would be good at it. Ouch!
#8. Jessica Biel & Chris Evans
When the pair used to date, their relationship had many ups and downs. In fact, they dated on-and-off for four years.
Even though Biel's career had already taken off and Evans had several parts in mini-series and TV movies, it is safe to say that these two have come very far since they used to date.
#7. Juliette Lewis & Brad Pitt
When he was 26, and before he broke out in Thelma and Louise, Brad Pitt used to date his 17-year-old Too Young to Die? costar Juliette Lewis. Despite the age difference, their relationship lasted for years.
When asked about their relationship in 2010, Lewis told The Daily Mail: It amazes me that people are still fascinated that we went out for four years (...) I was in my high-school years and it was a wonderful, loving relationship with a fun, smart guy. Then it was over and he went on to become incredibly famous".
#6. Lisa Kudrow & Conan O'Brien
The two comedians met in an improv comedy class and hit it off right away. Their relationship didn't work out, though, and they decided that they would be better off as friends.
We have to thank Conan for being a good friend to Lisa, as he encouraged her to keep on going when the actress felt too embarrassed to continue in her improv class.
#5. Carey Mulligan & Marcus Mumford
The couple's adorable love story dates back to their childhood when they used to be pen pals. Many years later, in 2011, Mulligan and Mumford reconnected at a party in Nashville.
How does the story end? With a happy ending! The couple got married in 2012 and had to children: a daughter, and a son.
#4. Jon Hamm & Jennifer Westfeldt
Before Mad Men launched Hamm's career into stardom and before Westfeldt co-wrote and starred in Kissing Jessica Stein, they were together for almost twenty years.
The pair dated from 1997 to 2005. They definitely made a great couple, didn't they?
#3. Robin Thicke & Paula Patton
The couple began their love story when they were only 15 years old, and remained together when both of their careers exploded.
Sadly, their relationship ended in 2014, after 21 years together.
#2. Scarlett Johansson & Jack Antonoff
The now hit music producer and the ultra-famous actress dated for two years while attending the Professional Children's School in New York City. Can you believe they even went to prom together?
However, according to a school pal, Jack was absolutely obsessed and Scarlet didn't reciprocate. The actress broke his heart, and the couple broke up shortly after graduation.
#1. Neil Patrick Harris & Christine Taylor
The How I Met Your Mother star may be openly gay and happily married to David Burka now, but can you guess who he dated years before?
Back in his early 20s around 1997, he dated actress Christine Taylor, though for a short period of time.