Marc Mann is an American keyboardist, guitarist, programmer, arranger and conductor. He has a Master's Degree in Music from UCLA. Mann is known for his work with Oingo Boingo, Jeff Lynne and the Electric Light Orchestra.
Mann is credited as performer, arranger or producer on 54 albums. He is a long-time collaborator with Danny Elfman in such films as the Men in Black series, Mars Attacks!, Sleepy Hollow, plus many more. He is usually credited for MIDI supervision and some orchestrations. On stage he is recognisable because he usually wears a cap.[citation needed]