Irving Levin[1] (April 26, 1925 – September 18, 2021), known professionally by his stage name of Leo De Lyon, was an American actor best known for his role as Spook and Brain in the prime-time animated series Top Cat.
[2] De Lyon co-starred with Bob Haymes and Dorothy Loudon in the DuMont Television Network sitcom It's a Business (March–May 1952).
[3] His specialty on this show was singing and whistling two different tunes - notably the Farandole from Georges Bizet's Arlesienne Suite - at the same time.
In the mid- and late 1970s he performed on stage as pianist and vocal entertainer and was musical director for several artists such as Sandler and Young.
In the mid-1990s he recorded several songs with Mark Harris who was a frequent guest on the Howard Stern Show.