Matthew Broderick, Liam Aiken

By MARC GRASER, JILL FEIWELL

Broderick

Matthew Broderick has signed on to provide the voice of the lead dog Hubble in MGM's live-action family pic "Good Boy!," which revolves around canine-shaped aliens who try to take over the Earth. Liam Aiken ("Road to Perdition") has also joined the cast as the dog's owner. Brittany Murphy and Carl Reiner have already been cast as voices of the pic's CG-enhanced dogs, while Molly Shannon and Kevin Nealon play Aiken's parents. Production of the pic began in August. Jim Henson Pictures is producing, along with the Lion.