Acting Out may refer to:

• Acting out, a psychological term
• Acting Out (Will & Grace), an episode of Will & Grace
• Acting Out (book), a 2003 book by French philosopher Bernard Stiegler

Acting out is a psychological term from the parlance of defense mechanisms and self-control, meaning to perform an action in contrast to bearing and managing the impulse to perform it. The acting done is usually anti-social and may take the form of acting on the impulses of an addiction (eg. drinking, drug taking or shoplifting) or in a means designed (often unconsciously or semi-consciously) to garner attention (eg. throwing a tantrum or behaving promiscuously).