John Colicos and Gregory Sierra have appeared together in 2 films between 1971 and 1972. Every shared film with year, roles and gross, plus who else each works with most.
| Year | Film | Box office |
|---|---|---|
| 1971 | Red Sky at Morning | |
| 1972 | The Wrath of God |
John Colicos also often with: Brook Williams (2), John Horsley (2), Lorne Greene (2), Marianne Stone (2), Richard Burton (2)
Gregory Sierra also often with: Lloyd Bridges (3), Matt Clark (3), Stuart Rosenberg (3), Andreas Katsulas (2), Anthony Zerbe (2)