Kieran Culkin has signed on to star in Edgar Wright’s upcoming action comedy “Scott Pilgrim vs. the World," based on the graphic novel by Bryan Lee O’Malle.

The film centers on a guy who has to defeat his new girlfriend’s seven ex-boyfriends. “Superbad” star Michael Cera will play titular character Scott Pilgrim, while Mary Elizabeth Winstead will take over the role of his love interest.

HitFix reported Culkin will play Wallace Wells, Pilgrim's responsible gay roomate, with whom he shares a bed (Pilgrim, however, is heterosexual).

Kieran, one of Macaulay's brothers, was last seen in 2002's drama "Igby Goes Down." His latest flick, "Lymelife," is debuting at this year's Sundance. Culkin is also currently filming "Paper Man" for Kieran and Michele Mulroney.

Michael Bacall penned he screenplay for "Pilgrim." Wright most recently directed “Hot Fuzz.”

After all of Michael Cera's recent success, it's hard to imagine the actor is starring in an upcoming project nobody's ever heard of before.

In today's world of filmmaking, it's pretty tough to keep secrets, but the people behind the indie film "Paper Hearts" have done a pretty solid job so far.

According to the Hollywood Reporter, "Paper Hearts," which stars Cera and other folks from Judd Apatow's crew, is expected to hit the big screen at the next Sundance Film Festival.

Almost nothing is known about the film at this stage, although the trade says sources describe it as a "part-documentary, part-scripted comedy about the real-life relationship between Cera and his girlfriend, Charlyne Yi."

Oh, and apparently, music plays a big role in the movie as well. While this doesn't tell us much, I have to admit I now am eager to learn more.

Cera most recently starred in "Nick and Norah's Infinite Playlist." The star has plenty of projects coming up, including "The Year One" and "Youth in Revolt."

Who ever thought Cera would go all secret on us, huh?