The surprising real-life age differences between 12 famous rom-com pairs

In the film, Cooper plays a divorcé who falls for a widow, played by Lawrence.

It's unclear exactly how old the characters are supposed to be, but at the time of the premiere, Cooper was 37 and Lawrence was 22.

Although the characters are meant to be the same age as the film moves through 12 years of their lives, Crystal and Ryan are over a decade apart. 

The Nora Ephron classic first hit theaters in 1989, when Crystal was 41 and Ryan was 27.

When the film premiered, Gere was 40 and Roberts was 22.

The two also starred opposite each other in "Runaway Bride" in 1999 when Gere was 49 and Roberts was 31.

In the 1995 film, Bullock played Lucy and Pullman was Jack. At the time of the premiere, Bullock was 30 (almost 31) and Pullman was 41.

The cult-classic romantic comedy "Roman Holiday" starred Hepburn and Peck as love interests.

Hepburn was 24 and Peck was 37 when the film came out.

In the film, the two play love interests in their late 20s. But when the film premiered in the summer of 1997, Mulroney was 33 and Diaz was 24.

When the 2003 film premiered, Hudson was 23 turning 24 and McConaughey had recently turned 33.

When Keaton played the titular role of Annie Hall, she was much younger than her love interest, played by controversial filmmaker and actor Allen.

The film premiered in April 1977 when Allen was 41 and Keaton was 31.

Barrymore and Sandler have starred as love interests in a few films. When their first movie together, "The Wedding Singer," premiered in 1998, Sandler was 31 and Barrymore was a week from turning 23.

They later worked together on "50 First Dates" in 2004 and "Blended" in 2014. 

When Stone and Gosling first appeared together in "Crazy, Stupid, Love" in 2011, she was 22 and he was 30.

They went on to reunite for "La La Land" in 2016. 

Zellweger isn't that close in age to either of her love interests from "Bridget Jones's Diary."

Funnily enough, Hugh Grant and Colin Firth were born a day apart (Grant is older), and they were both a little over 40 when the film premiered in 2001. Zellweger was about a week away from turning 32 at the time. 

The musical romantic comedy featured Adams and Dempsey as unlikely love interests.

When the movie premiered in 2007, Dempsey was almost 42 and Adams was 33.