Jennifer GarnerandMark Ruffalomade for an adorable on-screen duo in the fan-favorite 2004 film13 Going On 30.
The actress' portrayal of a teenager stuck in an adult’s body was hilarious and endearing.
Of course, Jenna and Matt live happily ever after in a very different version of her 30-year-old life.

However, Garner and Ruffalo’s sweet pairing almost didn’t happen.
“We started to learn the dance,” the actress admitted.
Thankfully,Ruffalo stuck it outand made the dance scene one of the best in the movie.

The pair liked working together so much that they both signed on to play opposite together inThe Adam Project.
The movie stars Ryan Reynolds as a time traveler.
Ruffalo is set to play Reynolds' father, while Garner will appear as the character’s mother.
“It was wonderful.
“It was actually a really beautiful experience to revisit that relationship.”