Gwyneth Paltrow is known for over-sharing on her Twitter account, so this casting feels appropriate. According to Variety, the doomed 'Contagion' star and Joely Richardson have joined Mark Ruffalo and Tim Robbins in 'Thanks for Sharing,' an indie dramedy about how sex addiction brings four friends together. Paltrow will play Phoebe, a businesswoman who falls for Ruffalo; Richardson is set for role of Robbins's onscreen wife. Stuart Blumberg, Oscar-nominated as co-screenwriter for 'The Kids Are All Right,' makes his directorial debut with 'Sharing,' which he co-wrote with Matt Winston. [Variety/Showblitz]