Traditionally, the verb cast is uninflected in the past tense and as a past participle, and casted was not a dictionary-recognized form. But in modern usage, casted is gaining ground. It’s especially common in film and theater-related contexts, where it is unquestioned.
Examples
In this example, cast is correctly used as a past-tense verb:
I cast my line, and sure enough he was all over it. [Colorado Angler]
And in this sentence, cast is correctly used as a past participle:
Ranulph Mabier, cast ashore by one of the Channel’s fierce storms, comes to live with the du Frocqs … [Shelf Love]
When the verb cast means to assemble a lineup of actors, the past-tense and past-participle casted is becoming standard—for example:
Jessica Biel, left, and Jaime Foxx, centre front, star in Garry Marshall’s impressively casted romantic comedy Valentine’s Day. [Metro News]
Even though this usage is becoming more common, cast still works in these contexts.
