Michael Gambon and David Ryall made 2 films together, averaging 7.12, 0.65 above their career marks. The best is Harry Potter and the Deathly Hallows: Part 1 at 7.7.

Michael Gambon averages 6.51, David Ryall averages 6.43. Apart that suggests 6.47; together they average 7.12, a lift of +0.65.

Lift is the average of their films together minus the mean of their two career averages.