Paul Rudd has revealed that Judd Apatow's new film This Is Forty isn't a sequel.
The Dinner For Schmucks star is currently shooting the comedy - the follow-up to Knocked Up - which is expected to follow his and Leslie Mann's characters in the earlier film years on.
"It isn't a sequel. Leslie Mann and I are playing the same characters that we did in Knocked Up and it's kind of our story," he told Collider.
The actor also confirmed Charlyne Yi's involvement in the movie, adding: "There are some characters that are surprising and some new ones too. There's Charlyne Yi. And as far as it goes, I don't know how much of them are set. We are shooting right now but certain things are open."
Paul - who next stars in Our Idiot Brother alongside Zooey Deschanel, Emily Mortimer and Elizabeth Banks - said the film may be kept under wraps, but it's not intentional.
"I realise people don't know what it is about," he admitted.
"Judd was talking yesterday and... it's not like he is being secretive but he doesn't want people to know and get sick of it. But he also said, 'it's not like anyone would care! It's not like we're Terence Malick here!'"