Beryl Cyril "Jack" Sheldon Jr. (November 30, 1931 – December 27, 2019) was an American jazz trumpeter, singer, and actor.

He performed on The Merv Griffin Show and participated in episodes of the educational music television series Schoolhouse Rock!

[2] He originally became known through his participation in the West Coast jazz movement of the 1950s, performing and recording with such figures as Stan Kenton, Art Pepper, Gerry Mulligan, and Curtis Counce.

Sheldon voiced "Louie the Lightning Bug" in a series of animated musical public service announcements (animated by legend Bob Kurtz from his Kurtz & Friends studio) aimed at children across the United States and Canada, beginning in May 1984, promoting safety with electricity.

Sheldon appeared in an Oscar-nominated documentary film Let's Get Lost about the life of fellow jazz trumpeter Chet Baker.

He made an appearance in the 1994 film Radioland Murders as the ill-fated trumpet player Ruffles Reedy, who becomes a victim of the gruesome goings-on during a 1939 radio show.

Produced by Doug McIntyre and Penny Peyser, the film features interviews with Clint Eastwood, Billy Crystal, Merv Griffin, Chris Botti, Dave Frishberg, Johnny Mandel, Tierney Sutton, as well as never before seen concert footage of Sheldon playing, singing and joking.