Even at their most obnoxious, Will Ferrell and John C Reilly are strangely adorable together. Their on-screen chemistry was key to the success of Talladega Nights and they capitalise on that spark in this equally zany comedy, reteaming with director Adam McKay. Brennan (Ferrell) and Dale (Reilly) are a couple of 40-something losers who still live at home. All the gags rest on how these burly men act like spoilt children when their parents (Mary Steenburgen and Richard Jenkins) get hitched. They draw battle lines in the room they're forced to share, staring each other down at bedtime and trading peculiar (and phenomenally vulgar) insults - it's these elaborate exchanges that get the biggest laughs. But things do get a little weird and creepy as the gross-out moments get ever grosser, and the film's one joke is rather overstretched. Thankfully, Adam Scott shakes things up as Ferrell's overachieving brother - a bit like Tom Cruise on a sugar buzz. Of course it's totally juvenile, but that is, after all, the point.

Brennan Huff and Dale Doback might be grown men. But that doesn't stop them from living at home and turning into jealous, competitive stepbrothers when their single parents marry. Brennan's constant competition with Dale strains his mom's marriage to Dale's dad, leaving everyone to wonder whether they'll ever see eye to eye.