Marc Mann is an American keyboardist, guitarist, programmer, arranger and conductor. He is known for his work with Oingo Boingo, Jeff Lynne and Electric Light Orchestra. In 2002 he performed in the "Concert for George" alongside Eric Clapton, Jeff Lynne, Ringo Starr and Paul McCartney, playing George Harrison's parts. He is credited as performer, arranger or producer on 54 albums.