Patrick Schwarzenegger Shoots Movie With Taylor Swift's Ex, Taylor Lautner!

Patrick Schwarzenegger and Taylor Lautner now have two things in common: Taylor Swift and costarring roles in Grown Ups 2.

The University of Southern California freshman, 18, and the teen heartthrob, 20, shot scenes for their new movie in Massachusetts July 6. A sequel to the 2010 comedy Grown Ups, the film also stars Adam Sandler, 45, Salma Hayek, 45, Andy Samberg, 33, Milo Ventimiglia, 35, Kevin James, 47, Chris Rock, 47, Maya Rudolph, 39, Steve Buscemi, 54, Aly Michalka, 23, and David Spade, 47.

"Amazing first day on Grown Ups 2 with my frat brothas Jimmy Tatro and David Henrie," Patrick tweeted. "So happy to be part of this."

Patrick (his parents are Arnold Schwarzenegger and Maria Shriver) began filming just days after celebrating Independence Day in Hyannis Port, Massachusetts with Swift, 22, and his cousins in the Kennedy family. After sailing and a beach bonfire, Glee's Dianna Agron, 26, snapped photos of the pair. "He kept kicking sand at her and was flirty with her," an onlooker told Us Weekly.

Swift and Lautner dated in 2009 after meeting on the set of Garry Marshall's ensemble rom-com Valentine's Day. Swift reportedly wrote the song "Back to December" about their ill-fated romance.