When great casts happen to iffy premises: Robert De Niro, Diane Keaton, Katherine Heigl and Amanda Seyfried have all signed on to star in Gently Down the Stream, an indie comedy about a divorced couple (De Niro and Keaton) who pretend they are still together "for the sake of their adopted son's wedding and his biological mother." Hmm. Justin Zackham (The Bucket List) will write and direct. Double hmm. [Variety]
