The Insider.com

Although Brooklyn Decker has yet to have children of her own, she wears her very own prosthetic baby bump in What to Expect When You're Expecting and had a good time doing it.

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While she may not have plans of starting a family with husband Andy Roddick anytime soon, Decker revealed that she might be getting a double dose with her first pregnancy, as twins run in her family.

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"My grandmother was a twin...my cousins are twins," Decker revealed. "That's scary. This could happen." The 25-year-old model, who has another movie, Battleship, premiering on the same day as What to Expect, said that she had a blast filming the movie and being a "goofball."

A slew of women are pregnant for the film, including Cameron Diaz, who stated that she enjoyed wearing the prosthetic bump as well. Although Diaz has yet to have children, the bump looked so real that others began to speculate if she was actually pregnant.

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"It looked completely real and people...were convinced at times [that it was real]," the California native said.

Check out all the stars at the premiere of What to Expect When You're Expecting (in theaters this Friday (May 18)) in the video above.