Ashley Tisdale

Stefanie Keenan/WireImage

Ashley Tisdale is ready to get crazy!

The former High School Musical star is set to make a guest appearance on an upcoming episode of CBS' new comedy The Crazy Ones, we've exclusive learned.

In an upcoming episode, Tisdale will play an intern at the advertising firm ran by father-daughter duo Simon (Robin Williams) and Sydney (Sarah Michelle Gellar). Of course, there's more to this intern than meets the eye as her character Kelsi just so happens to be the daughter of one of the agency's biggest clients. (We're guessing she won't be getting coffee anytime soon!)

Recently engaged to rocker beau Christopher French, Tisdale popped up on ABC's Super Fun Night as Rebel Wilson's sister, and has made guest appearances on Sons of Anarchy and Raising Hope.

Tisdale is just the latest crazy-awesome guest star to land a role on the new hit sitcom: Ed Asner and Brad Garrett are set to stop by this season and Kelly Clarkson made a hilarious cameo as herself in the premiere.

The Crazy Ones has proven to be one of the fall's breakout hits, with its premiere episode bringing in 15.6 million viewers and a 4.0 rating in the demo, and in our Save It or Sink It poll, 81.9 percent of you voted to "Save" The Crazy Ones.

The Crazy Ones airs Thursday at 9 p.m. on CBS.

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