Credit: Paul Archuleta/FilmMagic

Watch out, Liz Lemon!

Denise Richards is set to appear on NBC's 30 Rock, the actress confirmed via Twitter Wednesday.

"So excited!! I'm going to be doing an episode of #30Rock! one of my favorite shows!!!!!" Richards, 40, wrote.

The actress, author and mom of three's new role comes on the heels of a successful arc on Spike TV's Blue Mountain State, where she appeared as Debra.

There's no word yet on when Richards' 30 Rock episode will film or air -- season six is set for a 2012 premiere, delayed by series star Tina Fey's second pregnancy.