Boogie Woogie, starring Amanda Seyfried, Alan Cumming, Gillian Anderson, Heather Graham, and like 27 other people, comes out in April. As you will see from the trailer, it's about a whole bunch of people having affairs with each other in the London art world, which appears to be quite a scene! (The movie employed Damien Hirst as a consultant.) From the trailer it looks like a standard-issue overpopulated screwball comedy, but this is also part of the synopsis: "Each parallel story plummets towards its own depraved and egotistical conclusion until the stories collide, leading to a sobering and tragic finale." So there's probably a terrorist attack at the end, just a warning.