Thomas Douglas Allsup (November 24, 1931 – January 11, 2017) was an American rockabilly and swing musician.

[4][5] Allsup worked with entertainers such as Buddy Holly, including playing lead guitar on "It's So Easy!"

He returned to Odessa, Texas, where he worked with Ronnie Smith, Roy Orbison, and producer Willie Nelson.

[5] He was also producer on the futuristic, prophetic trans-Atlantic and Australasian hit "In the Year 2525" by one-hit-wonders Zager & Evans.

[9] The last surviving member of Buddy Holly's "touring" Crickets for the 1959 Winter Dance Party, Tommy Allsup died on January 11, 2017, at 85 years old in a hospital in Springfield, Missouri, after complications from hernia surgery.