Mary Ellen Kay and Koko have appeared together in 4 films between 1951 and 1952. Every shared film with year, roles and gross, plus who else each works with most.
| Year | Film | Box office |
|---|---|---|
| 1951 | Rodeo King and the Senorita | |
| 1952 | Border Saddlemates | |
| 1952 | Colorado Sundown | |
| 1952 | The Last Musketeer |
Mary Ellen Kay also often with: Rex Allen (6), Roy Barcroft (5), Allan Lane (3), Black Jack (3), Buddy Ebsen (3)
Koko also often with: Rex Allen (14), Slim Pickens (11), Roy Barcroft (9), William Witney (9), Forrest Taylor (4)