What is an idol of the silver screen?

Answer 1

To provide optimal reflection of the light from a film projector, many theaters of the past (most in the black-and-white days though they are sometimes still used today) relied on a silver-coated projector screen (rather than a white one). Thus the "silver screen" tends to refer to mainstream cinema (usually of the early days of Hollywood) and their associated movies.

And idol of the silver screen simply refers to an idol (a well-recognized celebrity) of the cinema (again, usually of the old days).

Answer 2

it means to see something good

Answer 3

A film star