'Dark Knight,' 'Juno' win Grammys

'WALL-E' also honored in the film music category

The soundtrack for "Juno" was the first winner at the 51st annual Grammy Awards, taking home a trophy for best compilation soundtrack. Best score soundtrack went to James Newton Howard and Hans Zimmer for "The Dark Knight."

The Grammy for best motion picture song went to "Down to Earth" from the Disney/Pixar film "WALL-E." Thomas Newman, who co-wrote the song with singer Peter Gabriel, accepted the award. The song is also nominated for an Oscar.

Another collaboration by Gabriel and Newman from "WALL-E," "Define Dancing," won a Grammy for best instrumental arrangement.

The film music Grammys were the first to be awarded Sunday during the pre-telecast awards at Los Angeles' Staples Center.