By Kerrie Mitchell
Updated June 22, 2007 at 04:00 AM EDT

This slim coming-of-age tale about a teen (Grint) torn between his shrewish mother (Linney) and the flamboyant actress he works for (Walters) has a few moments of charm, as when Walters’ grande dame is mistaken for God during a Bible pageant. But the talented cast seems wasted on clunky plot twists (an insane transvestite swoops in for the finale) and one-note characters. EXTRAS In a making-of Driving Lessons, Walters — Grint’s mum in the Harry Potter movies — comments on the young actor’s own coming-of-age: ”Those biceps! The girls will be going mad!” C