Kaley Cuoco attends the 16th Annual GQ "Men Of The Year" Celebration at Chateau Marmont on November 17, 2011 in Los Angeles, California. Credit: Steve Granitz/WireImage.com

Kaley Cuoco's biggest beauty secret has been revealed!

The Big Bang Theory star's rep confirms exclusively to Us Weekly that the blonde actress is the newest face of Proactiv. The start date for her campaign has yet to be announced.

Cuoco, 26, follows in the footsteps of the acne treatment skin-care line's star-studded roster, which includes Julianne Hough, Justin Bieber, Naya Rivera and Katy Perry.

Glee's Rivera, who is a longtime fan of the famous three-step acne-clearing system, signed on as the brand's celeb spokesperson in December 2011.

"The makeup artist on the set of Glee gave it to me and I kept it using it because I knew it worked for other people," Rivera, 25, has said. "I really wanted to work with Proactiv because the products really helped me."

Besides Proactiv's products, Cuoco has recently tweeted her love for another skin saver: Josie Maran's Argan Oil Moisturizing Stick. "The Josie Maran beauty balm stick is my new favorite thing ever! Thanks @jamiemakeup for letting me steal it from you :)" the star tweeted to her makeup artist on Saturday.

Cuoco isn't the only star to land a beauty spokesmodel gig this week. On Monday, CoverGirl announced Pink as the newest addition to their celebrity-filled roster, which includes Taylor Swift, Sofia Vergara, Drew Barrymore, Ellen DeGeneres and Queen Latifah.