Covered in blood and carrying a large gun, Sienna Miller cuts a commanding and scary figure.

But fortunately the actress isn't on any death mission but filming on set for her new film G. I. Joe in Prague.

The sexy star bears a striking resemblance to Matrix star Carrie-Ann Moss which is far cry from the blonde Sienna most of her fans are used to seeing.

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Sienna Miller cuts a commanding figure dressed all in black and carrying a gun

Dressed in a skin-tight leather suit, the sexy star plays gun-toting femme fatal The Baroness, in the blockbuster film, which is due to be released next year.

The usually blonde starlett dyed her hair dark for the role which sees her play an intelligence officer for evil arms dealing organisation COBRA.

Sienna bears a striking resemblance to Matrix star Carrie-Ann Moss

Her character, based on the classic army comic strip, is an evil but sexy woman and despite the fake blood and gun, Sienna still manages to look great on camera.

A smiling Sienna is obviously enjoying showing her darker side with sources revealing the 26-year-old has had a lot of fun while filming the role.

Covered in blood, Sienna Miller smiles on the set of her new film G. I. Joe which is being filmed in Prague

Blonder Sienna as we are more used to seeing her