In some movies I watch, there is a character who, at the beginning of the movie, seems like they're supposed to be a minor or background character, but the person playing them is a name-brand actor and so you know that they are not going to remain a minor or background character. Sometimes, for plot/story telling reasons, it is the case that this character is intentionally (falsely) portrayed as just a minor character at the beginning. However, since the actor playing the character is a big deal actor, it is easy to suspect that this minor character isn't so minor after all, and this destroys the illusion of the character not being important.
Is there a term that means this? A character that is intentionally initially portrayed as not being important to the plot even though they are but that it is fairly obvious to the audience from the beginning, based on the star-level of the actor portraying the character, that the character won't remain a minor character?