Larry McMurtry averages 7.01 across 7 rated films as a writer, ahead of Randy Quaid at 6.05 as an actor.
Dot size shows IMDb votes. Films with fewer than 1,000 votes sit on the baseline.
| Texasville | 1990 | 6.0 | as Lester Marlow | Writer |
| 2005 | 7.7 | as Joe Aguirre | Writer |