THR reports that McCarthy has now joined Apatow's "Knocked Up" spinoff, formerly unofficially known as "This Is Forty" (got that? it was the working title). The film will star Leslie Mann and Paul Rudd, who are reprising their roles Debbie and Pete, in the picture that will follow their relationship five years after the events of the preceding movie. McCarthy already joins an intriguing mix of old and new Apatow players including Megan Fox, Albert Brooks, Lena Dunham, Chris O’Dowd, Charlene Yi and Wyatt Russell. Also coming along for the ride is "Super 8" kid Ryan Lee, otherwise known as pyro expert Cary in J.J. Abrams' fantastic summer film.
Details are being kept mum, but here's what we know so far. O’Dowd and Dunham will play employees at the record label that Pete now runs (it seems his character has moved up in the world from being a music scout), while Russell will play a hockey player (no idea where that fits in the story just yet). McCarthy will play the Mom of Lee who attends the same school that Pete and Debbie's kids go to (which pretty much confirms Iris and Maude Apatow are back again).
Production is underway and the film will hit on December 21, 2012.