Rumer Willis is one busy girl! Straight from the success of 'The House Bunny,' Rumer is now scheduled to guest star on CSI: NY.

It isn't just any episode either, she'll guest star on the 100th episode….the landmark episode, airing Nov. 19.

Rumer will play a character by the name of Mac Taylor, who will be under investigation for murder. Sorry no spoilers, that's all you get.