The band, which formed in 1970, originally included:
Steven Tyler - Vocals (born March 26, 1948 in New York, NY)
Joe Perry - Lead Guitar (born September 10, 1950 in Lawrence, MA)
Joey Kramer - Drums (born June 21, 1950 in New York, NY)
Ray Tabano - Rhythm Guitar (born December 23, 1946 in in New York, NY)
Tom Hamilton - Bass Guitar (born December 31, 1951 in Colorado Springs, CO)
Brad Whitford (born February 23, 1952 in Winchester, MA) replaced Ray Tabano on Rhythm Guitar before the band first recorded. Ray stayed on throughout the 1970's, helping to maintain the band's office, hangout, and recording studio.
In the late-'70's and early '80's the band had trouble getting along and first Joe Perry, and then, Brad Whitford left the band. They were replaced by:
Jimmy Crespo - Lead Guitar (born July 5, 1954 in Brooklyn, New York, NY)
Rick Dufay - Rhythm Guitar (born February 19, 1952 in Paris, France)
In early 1984, Perry and Whitford returned, reuniting the original recording band - and despite rumors and the occasional blowup, that lineup continues on to this day.