Dennis Holmes was born in 1950 in Encino, California.He is a child actor that is best-known for his appearances on the western tv show, Laramie (1959) as Mike Williams.

In addition to Laramie, Dennis also worked on many other western television shows, such as Restless Gun, Bonanza, The Deputy, Tales of Wells Fargo, The Virginian, and Wagon Train.

The Reel Cowboys presented Dennis with a well-deserved Silver Spur award in 2019.