Tom Cruise Films An Underwater Action Scene For Mission: Impossible 4

Not quite as comfy as wife Katie Holmes' posh Hollywood Hills set, but still! Check out still-hot Tom Cruise in action mode filming Mission: Impossible 4 in Prague - the cast and crew was filming a scene in the Vltava River last night...

Speaking of the cast, what a great one it is! Jeremy Renner and Simon Pegg have joined the fourth installment of the successful action franchise. The Brad Bird-directed thriller hits theaters December 2011.