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Megan Fox is diving headfirst into her role in the upcoming comedy This Is Forty.

The 25-year-old actress shared a behind-the-scenes photo with costars Chris O'Dowd, 31, and Jason Segel, 31, on Facebook Saturday, calling them "two very handsome, very tall, very funny men."

Though Fox showed off her healthier new curves on Wednesday, she kept her figure hidden while posing underwater in the pool.

The Judd Apatow flick, which revolves around Paul Rudd and Leslie Mann's characters from the 2007 smash Knocked Up, also stars Melissa McCarthy, John Lithgow, Maude Apatow and Ava Sambora.

"Megan is hilarious," Rudd, 42, recently told E! News. "I don't know if people don't realize that, but she is really really funny."