The blonde beauty plays mum-to-be Jules in the upcoming comedy and was fitted with a prosthetic bust to give the illusion she was gaining baby weight.

And she was so happy with her enhanced chest, she couldn't wait to show it off to the cast and crew.

Co-star Matthew Morrison says, ""They were fake breasts because her character was pregnant. She was walking round with her shirt open all day on set, though, loving her big boobs.""