William Peter Blatty averages 6.80 across 3 rated films as a director, ahead of Blake Edwards at 6.34.
Dot size shows IMDb votes. Films with fewer than 1,000 votes sit on the baseline.
 A Shot in the Dark | 1964 | 7.3 | Director, Producer, Writer | Writer |
| What Did You Do in the War, Daddy? | 1966 | 6.6 | Producer, Director, Writer | Writer |
| Gunn | 1967 | · | Director, Writer | Writer |
| Darling Lili | 1970 | 6.1 | Producer, Writer, Director | Writer |
