British actor Colin Firth is terrified of getting his legs out in upcoming Roman epic THE LAST LEGION, because he fears they will ruin his sexy image.

The GIRL WITH A PEARL EARRING star is no stranger to period costume, but the idea of a Roman skirt is more than he can bear.

Firth, 45, says, "Whether you have the build or not, you can be killed in a costume.

"Russell Crowe didn't look ridiculous, but even if you have the most incredible physique there is still a danger of looking comical flaunting it in a skirt. You might become some sort of cheesy erotic fantasy.

"It is dangerous if you have beautiful legs and dangerous if you have legs like pipe cleaners. I can leave you to guess which applies to me."