Sienna Miller burned her cleavage on the set of G.I. Joe.

The actress plays femme fatal The Baroness in The Rise of Cobra and was injured after getting too close to a controlled explosion.

“Luckily it wasn’t my breasts, it was the bit in-between. It got a bit burned when an explosion got a bit close,” she explains.

The blonde vixen — who has been romantically-linked to a series of entertainment’s leading men — also revealed she hated wearing her character’s black leather catsuit.

“I won’t be wearing one again. Squeezing myself into that with the aid of talcum powder every day for five months was more than enough. I could barely move in it anyway.”

She added: “You know, ‘G.I. Joe’, it’s not going to be the best acting work we’ve ever done.”