Answer: Roy Rogers
Trigger (originally named Golden Cloud) was a palomino horse made famous in American Western films with his owner and rider, cowboy star Roy Rogers.
When Roy Rogers was preparing to make his first movie in a starring role, he was offered a choice of five rented “movie” horses to ride and chose Golden Cloud. Rogers eventually bought him in 1943 and renamed him Trigger for his quickness of both foot and mind.
Trigger was ridden by Rogers in many of his motion pictures, becoming one of the most famous horses in film entertainment.
Roy Rogers was an American singer, actor, and television host. Following early work under his given name, first as co-founder of the Sons of the Pioneers and then acting, the rebranded Rogers then became one of the most popular Western stars of his era.