Koko
Acting
Acting
Phantom Stallion
Rex's Horse
1954
Red River Shore
Rex's Horse
1953
Shadows of Tombstone
Rex's Horse
1953
Down Laredo Way
Koko, Rex's Horse (as Koko the Miracle Horse of the Movies)
1953
Iron Mountain Trail
Koko
1953
Old Overland Trail
Rex's Horse
1953
South Pacific Trail
Koko
1952
Old Oklahoma Plains
Koko
1952
Border Saddlemates
Koko - Rex's Horse
1952
The Last Musketeer
Koko
1952
Colorado Sundown
Miracle Horse of the Movies
1952
Utah Wagon Train
Koko, Rex Allen's Horse (as Koko the Miracle Horse of the Movies)
1951
Rodeo King and the Senorita
Koko - Rex's Horse
1951
Hills of Oklahoma
Rex Allen's Horse (as The Miracle Horse of the Movies)
1950
Typhoon
Koko
1940