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Shared credits
John Ashley averages 5.36, Robert Dillon averages 5.90. Apart that suggests 5.63; together they average 5.35, a lift of −0.28.
Lift is the average of their films together minus the mean of their two career averages.
Dot size shows IMDb votes; lines are rolling five-film averages. Films with fewer than 1,000 votes are left out.
| Muscle Beach Party | 1964 | 5.2 | 1,976 | as Johnny | Writer, Producer |
| Bikini Beach | 1964 | 5.5 | 1,976 | as Johnny | Writer |