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Whittle / Benassi / Splash News 1 / 7

Reality star Heidi Montag is set to make her big screen debut in Adam Sandler's upcoming comedy "Just Go With It."

The "Hills" star has landed a cameo role in the romantic comedy, which boasts an all-star cast including Sandler, Jennifer Aniston and Nicole Kidman.

In a post on her Twitter.com page, Montag writes, "I was just cast in my first feature film comedy! I start filming Monday!!!!! This is one of the best days of my life!!! Getting ice cream to celebrate."

The movie is set for release next year.