Town, where he nominates Rodney as his new second-in-command and eventual successor. Rodney provides Herb with new replacement parts and a flugelhorn-like instrument to fulfill his dream of being a musician. After a shaky start, Herb leads Rodney, Cappy, the Rusties, Bigweld and the townspeople in a rousing rendition of "Get Up Offa That Thing" as the film ends. Voice cast Ewan McGregor as Rodney Copperbottom, an idealistic young blue robot and aspiring inventor. Will Denton and Crawford Wilson as Rodney (teenager) Jansen Panettiere as Rodney (child) Dylan Denton as Rodney (baby) Halle Berry as Cappy, a straight-laced human-themed executive at Bigweld Industries and Rodney's love interest. Robin Williams as Fender Pinwheeler, a mischievous red blender-like robot who befriends Rodney and is constantly falling apart. Mel Brooks as Bigweld, an elderly sphere robot who is the caring inventor and founder of Bigweld Industries. Greg Kinnear as Phineas T. Ratchet, the menacing and arrogant right-hand-man of Bigweld and Madame Gasket's son. Jim Broadbent as Madame Gasket, the evil owner of the Chop Shop. Amanda Bynes as Piper Pinwheeler, a plucky yellow tomboy robot who is Fender's younger sister. Drew Carey as Crank Casey, a cynical orange vacuum cleaner/monster truck-like robot who befriends Rodney. Jennifer Coolidge as Aunt Fanny (in the US version, also known as Aunt Fan in the UK version), a motherly snail-like robot who takes in outmoded and homeless robots. Harland Williams as Lugnut or "Lug", an imposing but good-natured green muscular robot who befriends Rodney along with his mute best friend Diesel. Alan Rosenberg as Jack Hammer, a rusty copperish orange robot who works at a hardware store. Stanley Tucci as Herb Copperbottom, Rodney's father and a dishwasher at Gunk's Greasy Spoon. Dianne Wiest as Lydia Copperbottom, Rodney's mother. Chris Wedge as Wonderbot, a small helicopter/cup-like robot, who is Rodney's invention. Natasha Lyonne (in the US version) and Cat Deeley (in the UK version) as Loretta Geargrinder, a receptionist at Bigweld Industries and Fender's love interest. Paul Giamatti as Tim, the puppet gatekeeper at Bigweld Industries. Dan Hedaya as Mr. Gunk, Herb's cynical, inconsiderate boss. Brian Scott McFadden as Trashcan Bot Jay Leno as Fire Hydrant Lucille Bliss as Pigeon Lady Paula Abdul as Wristwatch #1 Randy Jackson as Wristwatch #2 Al Roker as Mailbox Marshall Efron as Lamp Post, Toilet Bot, Bass Drum, and Microphone Randall Montgomery as Zinc, a ramshackle car robot Stephen Tobolowsky as Bigmouth