A British movie awards ceremony got a jump on all the others Tuesday night when the National Movie Awards, whose winners are decided by popular vote, gave top prizes to Mamma Mia! for best musical; The Dark Knight for best Superhero movie; Indiana Jones and the Kingdom of the Crystal Skull for best action/adventure film; Juno for best comedy; and Wall-E for best family film. Awards were also given to Johnny Depp for best actor ( Sweeny Todd ) and Meryl Streep for best actress ( Mamma Mia! ) The glittery awards show, which aired on ITV1, drew dismal ratings, however, averaging just 2.8 million viewers.