What's the word for an actor not getting a part in a movie? [closed]

Is the word you're looking for shafted?

From dictionary.com:

shaft [shaft, shahft] verb (used with object)

17. Informal. to treat in a harsh, unfair, or treacherous manner.

As the above dictionary entry implies, the term "shafted" usually means that the actor was unfairly treated. You wouldn't use this word if they just failed an audition and were legitimately rejected for a role.

Here is an example of such usage.

Perhaps it's snubbed, as in this example:

But when it came to making the now iconic movie version, [Julie Andrews] was passed over in favour of Audrey Hepburn because Julie "wasn't known at that time."

Later commenting on the snub, she said: "Audrey and I became good friends and one day she said to me, 'Julie, you should have done the role … but I didn't have the guts to turn it down'."

^{Source: The Gladstone Observer}

Also:

Was Edward Norton snubbed for the role of Hulk in Joss Whedon's Avengers?

^{Source: Gizmodo}

It's also widely used in the entertainment industry when a creative professional is not given an award that many believe they deserve. So often you will hear of actors being "snubbed for an Oscar".

How about "Swapped"

as in

https://www.theloop.ca/12-tv-characters-who-got-replaced-with-different-actors/

I thought about this before and that is the best term I could come up with