Sienna Miller Joins Ryan Reynolds' 'Mississippi Grind'!

Sienna Miller rocks a warm coat while jogging with her personal trainer at a park on Wednesday (November 13) in London, England.

Later in the day, the 31-year-old actress was stylish while attending the Isabel Marant Pour H&M Preview.

PHOTOS: Check out the latest pics of Sienna Miller

It was recently announced that Sienna has joined Ryan Reynolds‘ upcoming flick Mississippi Grind, which will start shooting in January.

Mississippi Grind centers on “a man, who teams up with a younger charismatic poker player in an attempt to change his luck. The two set off on a road trip through the South with visions of winning back what has been lost.”

FYI: Sienna is wearing an Asos coat.

10+ pictures inside of Sienna Miller jogging in a coat…