Tom Cruise and Jeremy Renner are both doing some serious acting -- jumping into an incredibly cold river while filming wild and spectacular scenes for Mission Impossible IV, and RadarOnline.com has all the bone-chilling pictures.

PHOTOS: Tom Cruise and Jeremy Renner Film A Scene For Mission Impossible IV

Currently filming on location in Prague, Czech Republic, the fourth Mission Impossible installment once again follows Cruise as IMF agent Ethan Hunt on a dangerous assignment.

PHOTOS: Tom Cruise & Jeremy Renner Spotted On The Mission Impossible Set

The cast and crew have been in Prague for the past few weeks. Tom's wife Katie Holmes and their daughter Suri visited the set late last month.

PHOTOS: Tom Cruise Cruisin For a Bruisin On Set

Ving Rhames, Simon Pegg, Paula Patton and Josh Holloway are also in the action-adventure flick which is set for a Dec. 16, 2011 release.

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Tom Cruise continued shooting the fourth installment of his smash hit Mission Impossible series in Prague Thursday, and RadarOnline.com has all the brand new pictures for you.

PHOTOS: Tom Cruise-in For A Bruise-In On MI4 Set

The A-lister, reprising his role as Ethan Hunt, appeared to sport a rash of bruises, likely from the gauntlet of stunts he's been doing for the movie. (Or, it could just be the magic of the Hollywood make-up chair.)