John O'Leary and Biff McGuire have appeared together in 2 films between 1968 and 1983, with a combined box office of $1.1 million. Every shared film with year, roles and gross, plus who else each works with most.
| Year | Film | Box office |
|---|---|---|
| 1968 | The Heart is a Lonely Hunter | $1.1 million |
| 1983 | The Heart Is a Lonely Hunter |
John O'Leary also often with: Alan Arkin (2), Chuck McCann (2), Cicely Tyson (2), Graham Jarvis (2), Hal Holbrook (2)
Biff McGuire also often with: Alan Arkin (2), Chuck McCann (2), Cicely Tyson (2), Hubert Harper (2), Jackie Marlowe (2)