Parker Posey can make anyone laugh, but she can't always explain why. "I would say stuff like on Will & Grace and people would laugh, and I'd be like, 'I don't get it,'" the Party Girl star admitted.

Sean Hayes, best known as the bitchily bright-eyed Jack McFarland in sitcom Will and Grace, transforms himself here into Oscar Levant, the depressive, drug-addicted pianist, actor and wit who was a ...