Adventureland and Speak with Kristen Stewart.
There is also a movie called Warrior with both Kellan & Ashley but i dont think its ready yet.
And Thirteen with Nikki Reed. Its amazing. :]
I can think of more and im 99% sure that you know these movies,but anyway ;]
well most of those movies arent yet yet im pretty sure, but some older ones with the twilight stars are :
taylor lautner- sharkboy and lava girl, cheaper by the dozen 2
kristen stewart- adventureland, jumper (though she is only in it at the end), catch that kid, and speak
robert pattinson- harry potter and the goblet of fire and little ashes
kellan lutz- prom night, accepted and stick it
Kellan Lutz Stick it and Prom night
Taylor: The Adventures of Sharkboy and Lavagirl 3-D and Cheaper by the Dozen 2
Kristen Stewart: Panic room and the messengers ( is a horror film,i not sure i written the right)
Jackson Ratbone: Big Stan
Kellan and Ashley doing a movie together Warrior
i think the movie coming out in january 2010.
Robert Pattinson is in Harry Potter and The Goblet of Fire, Little Ashes, How To Be, The Summer House, Vanity Fair, The Haunted Airman
Kristen Stewert has been in The Messengers -the first one-, Panic Room, Speak, In The Land Of Women.
Taylor Launter was in Cheaper By The Dozen Two and Shark Boy
Of course you have-
Robert in Harry Potter and The Goblet of Fire, Kristen is in Adventureland,
Kellen in Prom Night,
Taylor in Shark Boy and Lava Girl,
Peter in Riding in Cars with Boys,
Ashley in Warrior which also has Kellen in it(Don't know if this one is out yet)
Nikki in Thirteen
Elizabeth(Esme) is in The Family Stone