James Dewees is an American musician and songwriter, best known for his work as a keyboardist and backing vocalist in the rock band Reggie and the Full Effect. He has also been a member of other bands, including The Get Up Kids and My Chemical Romance, contributing to their unique sound and style. In addition to his band work, Dewees has released solo albums that showcase his talent for blending various musical genres. His contributions to the music scene have made him a respected figure among fans of alternative and emo music.