AceShowbiz - Elizabeth Banks is desperate to get her hands on an embarrassing casting photo from early on in her career - because it features the actress posing in a padded bra and old underwear. The "Zack and Miri Make a Porno" star got her start acting in commercials, and admits it was one of the most humiliating experiences of her life.

One audition went horribly wrong when she failed to bring a bikini to a body-baring photoshoot � and was forced to strip down to her "granny panties". And Banks fears the unflattering snap will one day come back to haunt her - if she doesn't locate it and destroy the evidence first.

She says, "You have to check your dignity at the door for sure (for commercials)... I remember going to a commercial audition for Bud Light or something and I get there and they go, 'All the girls are in bikinis. We're going to take Polaroids of you in a bikini'."

"A Polaroid is already not very flattering and I did not have a bikini that day so for me to stay in the running for the commercial I had to strip down to a really ugly padded bra and granny panties. And there's a Polaroid of me in granny panties. It exists somewhere. It was really humiliating."