An actor (or actress for female) is one who portrays a character in a performance. The actor performs "in the flesh" in the traditional medium of the theatre, and/or in modern mediums such as film, radio, and television. The analogous Greek term is (hypokrites), literally "one who interprets". The actor's interpretation of their role pertains to the role played, whether based on a real person or fictional character. Interpretation occurs even when the actor is "playing themselves", as in some forms of experimental performance art, or, more commonly; to act, is to create, a character in performance.

The Hero Initiative, formerly known as A Commitment to Our Roots, or ACTOR, is the first federally recognized not-for-profit organization dedicated to helping comic book creators, writers and artists in need. Founded in late 2000 by a consortium of comic book and trade publishers, including Marvel Comics, Image Comics, Dark Horse Comics, Wizard Entertainment, CrossGen Comics and Dynamic Forces Inc., the 501(c)(3) charity aims to assist comic creators with health, medical, and quality-of-life assistance.