Sienna Miller had a lucky escape after her breasts nearly caught fire during a stunt scene for her new action movie.

The British actress was filming a stunt sequence for G.I. Joe: The Rise Of The Cobra when an explosion nearly burnt her breasts.

She explained, "Luckily it wasn't my breasts, it was the bit inbetween.

"It got a bit burnt when an explosion got a bit close."

Miller also revealed that it wasn't only explosions that proved uncomfortable while playing The Baroness - she hated the character's black leather cat suit and has vowed never to wear it again.

"Squeezing myself into that with the aid of talcum powder every day for five months was more than enough."

G.I. Joe: Rise of the Cobra is released on August 7.