Seth Rogan's newly-svelte look wasn't enough to steal the spotlight from his gorgeous co-star Anna Faris when the pair hit the red carpet last night.

The House Bunny star made sure all eyes were on her by rocking up to the Hollywood premiere of Observe and Report in an extremely revealing dress that could barely contain her ample bosom.

While her floor-length gown looked elegant from the waist down, her curves threatened to spill out of the bikini-style upper half, which left little to the imagaination from certain angles.

In the movie Anna stars as Brandi, a make-up counter girl who catches the eye of a mall security guard played by Seth Rogen.