Important - while makeup designers are a typical part of the creative team and make design decisions about the makeup for each actor, they are traditionally under the direction of the costume designer.

The actors themselves are the ones responsible for applying that makeup according to the design for every performance. Not the wardrobe team, not the designers. Each actor is given a series of illustrations of their makeup look(s) for the show called face charts. These are like renderings but of just the face, showing each detail in the makeup that should be applied and where on the face it should be. These should be treated like putting on the costume itself and followed precisely for each performance. The collection of all face charts for the actor is called the makeup plot.

Actors are not responsible for applying things like prosthetics that require very precise application techniques and need to be hand painted once applied to the actor's face.