Donald William Ashworth (born March 16, 1931) is a musician who was a member of The Tonight Show Band[1] for thirty years before retiring in 1995.

[2] The sound, which was post-Swing, was described as "too clever to be pop music, but too popular to be considered jazz, the records released between 1952 and 1958 by this band were very much a product of their time.

"[3] Ashworth has played in numerous Broadway musicals, including Li'l Abner (870 shows), Do Re Mi, Goldilocks, and I Can Get It for You Wholesale.

His studio work includes well-known albums by artists such as Frank Sinatra,[4] Barbra Streisand, Tony Bennett, and George Clinton.

[5] He also contributed to albums such as The Other Side of Abbey Road by guitarist George Benson (1969), Dawg Jazz/Dawg Grass by musician David Grisman (1983), Inner City Blues by saxophonist Grover Washington, Jr., and Mysterious Traveller by the band Weather Report.