Roy Rogers, born Leonard Franklin Slye, was an American cowboy actor-singer who starred in some 90 motion pictures and over 100 episodes of a weekly television show from the late 1930s to the mid-1950s and reigned as 'King of the Cowboys'. Forming a singing group named the Pioneer Trio, later billed as Sons of the Pioneers, he and his partners were appearing in motion pictures. Roy Rogers was given his first starring role in the 1938 film Under Western Stars, which also featured Trigger, the horse that would be his costar until 1965. Rogers was teamed with Dale Evans, 'Queen of the West' in 1944, and they married in 1947. The Roy Rogers Show aired between 1951-1957 and the duo signed off with the song 'Happy Trails'