If you're wondering why there's been so much casting news lately (I'm sure it's plaguing your every thought), it's because of all the deal-making going on at the Cannes Film Festival.  So here are three more deals: Stanley Tucci and Carla Gugino have joined Kevin Spacey and Zachary Quinto in Margin Call; Lauren German, Milo Ventimiglia, Michael Biehn and Rosanna Arquette have signed up for The Divide; and Pierce Brosnan, Billy Bob Thornton, Maria Bello, and Giovanni Ribisi are on board for St. Vincent.  Hit the jump for details on all three films.Carla Gugino (Watchmen) and Stanley Tucci (The Lovely Bones) have joined the cast of Margin Call. Written and directed by J.C. Chandor, Variety says the film is "set during the lead-up to the financial collapse of fall 2008, and tells the story of eight people at a prominent investment bank during a tumultuous 24-hour period."  So basically you know it will have a happy ending that ends with a giant bailout that implicitly condones and encourages the behavior that led to the collapse.Next, we have The Divide.  Directed by Xavier Gens (Silent Hill), the cast will feature Lauren German (Hostel: Part II), Milo Ventimiglia (Heroes), Michael Biehn (Aliens), and Rosanna Arquette (Desperately Seeking Susan).  Per Variety, "The thriller, which is shooting in Canada, follows the story of six men, two women and a young girl struggling to survive in an apocalyptic world."  And I was so hoping that this description would be followed up with, "Hilarity ensues."Finally, Variety reports that Pierce Brosnan, Billy Bob Thornton, Maria Bello (A History of Violence) and Giovanni Ribisi (Avatar) will star in Walter Hill's St. Vincent.  Of these three projects, it's the one I'm looking forward to the most.  The film "follows a hitman (Bronsan) who goes undercover as a priest to get close to his target, a gangland traitor (Thornton). The hitman soon discovers that playing the good guy is more dangerous than being a mob killer."  Mickey Rourke was previously attached to play the hitman, but I guess after seeing The Matador, the producers just decided, "Yeah, Brosnan looks like a guy who would kill you for money."