Roy J. Bittan (born July 2, 1949) is an American keyboardist and pianist, best known as a long-time member of Bruce Springsteen's E Street Band. Bittan, nicknamed The Professor, joined the E Street Band on August 23, 1974, and plays the piano, organ, accordion and synthesizers. Bittan was inducted as a member of the E Street Band into the Rock and Roll Hall of Fame in April 2014.
Aside from his membership in Springsteen's band, Bittan has played on albums as a session musician, primarily for singer-songwriters and rock and pop artists, including Jon Bon Jovi, David Bowie, Jackson Browne, Lucinda Williams, Tracy Chapman, Chicago, Catie Curtis, Dire Straits, Bob Dylan, Peter Gabriel, Ian Hunter, Meat Loaf, Stevie Nicks, Bob Seger, Lou Reed, Celine Dion, Nelly Furtado, Patty Smyth, Jim Steinman and Bonnie Tyler.