As Actor/Actress
Phantom Stallion
Rex's Horse
Colorado Sundown
Miracle Horse of the Movies
Red River Shore
Rex's Horse
Utah Wagon Train
Koko, Rex Allen's Horse (as Koko the Miracle Horse of the Movies)
Typhoon
Koko
Hills of Oklahoma
Rex Allen's Horse (as The Miracle Horse of the Movies)
Iron Mountain Trail
Koko
Border Saddlemates
Koko - Rex's Horse
Shadows of Tombstone
Rex's Horse
South Pacific Trail
Koko
Rodeo King and the Senorita
Koko - Rex's Horse
Old Oklahoma Plains
Koko
Down Laredo Way
Koko, Rex's Horse (as Koko the Miracle Horse of the Movies)
Old Overland Trail
Rex's Horse
The Last Musketeer
Koko