->''"Creator/HenryFonda is the bad guy for once in his career; Creator/CharlesBronson is impressively inscrutable as the mysterious good guy; and Jason Robards is a tough guy, believe it or not."''
-->-- '''Creator/RogerEbert''' on ''Film/OnceUponATimeInTheWest''
The hiring of an actor to play a certain part which differs fundamentally from roles the actor is famous for or has played in the past. For instance, an actress who is known for playing kindly old grandma types suddenly cast as a scheming murderess. This is generally done when an actor wants to 'stretch his/her wings' or 'try something different'. In its highest form, this leads to an Oscar for the actor in question. Often, it can be very useful in TheReveal. Comedies will frequently use this trope for laughs; a wacky line will often sound much funnier coming out of the mouth of someone you'd never expect to say such a thing. If it works very well, it can even turn around a career.
Occasionally, Playing Against Type is something that comes up in retrospect. An actor who becomes famous for a certain type of role may have played a character who is the complete opposite early in his or her career. At the time, the role may have not been a departure but, when viewed later, the difference will seem quite stark.
The polar opposite of TypeCasting, although it is possible to invoke both at once. A source of HiddenDepths. Really bizarre cases (or those which look bad in hindsight) can lead one to ask WTHCastingAgency
For specific forms of Playing Against Type, see TomHanksSyndrome, LeslieNielsenSyndrome, PlayingWithCharacterType and NewSoundAlbum.