Glenn H. Randall Sr.
Born	Michael George Ripper (1908-12-25)25 December 1908 Melbeta, Nebraska, United States
Died	5 May 1992(1992-05-05) (aged 83) Newhall, Santa Clarita, California
Occupation	horse trainer
Years active	1951-1992
Children	Glenn H. Randall Jr. ("J.R.")

Glenn H. Randall Sr. was a professional horse trainer, best known for training the horse Trigger for the television series The Roy Rogers Show. He developed over 30 hand commands to which the palomino responded.^[1] Randall Sr. also trained Gene Autry's horse Champion the Wonder Horse.^[2]

His other work as a horse trainer for television and film includes the 1956 film Stranger at My Door and the 1959 film Ben Hur.^[3][4] He trained 78 horses for Ben-Hur, starting months before photography began. Glenn Sr. later worked as a wrangler on the 1979 film The Black Stallion and its 1983 sequel The Black Stallion Returns.

His son Glenn H. Randall Jr., also known as "J.R.", was also a horse trainer as well as a stunt performer and stunt coordinator who was active from 1959 to 2000.

• The Roy Rogers Show (101 episodes, 1951-1957), horse trainer
• Stranger at My Door (1956), horse trainer (uncredited)
• Ben Hur (1959), horse trainer (uncredited)
• The Black Stallion (1979), wrangler
• The Black Stallion Returns (1983), wrangler (uncredited)