09/20/2011 03:16 pm ET | Updated Nov 20, 2011

Kate Walsh Goes Dark For Charlie Sheen Roast (PHOTOS)

What does one wear to a roast?

While we've never had to dress for such an occasion, Kate Walsh did and her solution was to channel her sense of humor: go dark.

Walsh debuted a surprisingly raunchy side at last night's "The Comedy Central Roast Of Charlie Sheen" and a sexy black lace dress to go with it.

The "Private Practice" star delivered her lines (including this gem: "Charlie, you are an incredible medical specimen. I guess that's one of the benefits of waking up every morning at the crack of crack") wearing a sequin, body-hugging cocktail dress with lace sleeves, a dark departure for the star who usually wears bright colors or earth tones.

Walsh kept the rest of the ensemble simple with black pumps, a silver bracelet and darkly lined eyes.

To see pics of the unexpected roaster, see below -- and for clips and exclusive interviews from the Roast red carpet and backstage, click here.

Kate Walsh at Charlie Sheen Roast