Hugh Dancy Joins My Idiot Brother

As well as three other actors

Hugh Dancy, last seen on screen in, er, Confessions of a Shopaholic but shortly to be heard in documentary The Wildest Dream, has signed up to joing the cast of My Idiot Brother, joining Paul Rudd, Rashida Jones, Elizabeth Banks, Zooey Deschanel and Emily Mortimer.

Kathryn Hahn (Step Brothers, Anchorman), Shirley Knight (Paul Blart, Desperate Housewives) and Janet Montgomery (Entourage, the upcoming Black Swan) have also signed up today.

The film's already shooting in New York, with Rudd as the slacker idealist who crashes into the lives of his three more ambitious sisters.There's no word yet on who the newcomers will be playing, but our money's on Dancy being a boyfriend to one of the sisters, Hahn being someone's best friend, Knight being the family's mother and Montgomery playing your general temptress.

Jesse Peretz (The Ex) is directing.