Megan Fox wearing a hot pink bra is enough to get us into the theater to watch Judd Apatow's This Is 40!

The comedy, starring Paul Rudd, Leslie Mann and Jason Segel, is about a couple who have to deal with growing older ... and turning the big 4-0.

We have a feeling Apatow, who created Knocked Up, has another hit on his hands!

This Is 40 hits theaters on December 21.