Not all people working as an actor in film, television or theatre are professionally trained, but the vast majority are. Chances of succeeding as an actor are greatly enhanced by going to a drama school (or acting school). Most offer two to three years extensive and intense training on all aspects of acting, including work on voice, gesture, posture, facial expression, awareness of space and movement, either across the stage or around the camera, but generally both. Applications to drama schools are through auditions, and those who show their talent well are offered a place. Anybody over the age of 18 can usually apply to drama school to become a professional actor or actress.

Actors and actresses employ a variety of techniques that are learned through training and experience. Some of these are:

1. The rigorous use of the voice to communicate a character's lines and express emotion. This is achieved through attention to diction and projection through correct breathing and articulation. It is also achieved through the tone and emphasis that an actor puts on words

2. Physicalisation of a role in order to create a believable character for the audience and to use the acting space appropriately and correctly

3. Use of gesture to complement the voice, interact with other actors and to bring emphasis to the words in a play, as well as having symbolic meaning Shakespeare is believed to have been commenting on the acting style and techniques of his era when Hamlet gives his advice to the players in the play-within-the-play. He encourages the actors to “speak the speech...as I pronounced it to you,” and avoid “saw[ing] the air too much with your hand” , because even in a “whirlwind of passion, you must...give it smoothness.” On the other hand, Hamlet urges the players to “Be not too tame neither.”

He suggests that they make sure to “suit the action to the word, the word to the action”, taking care to “o'erstep not the modesty of nature.” As well, he told the players to not “...let those that play your clowns...laugh, to set on some quantity of barren spectators to laugh too,” which Hamlet considered to be a “villainous” and “pitiful” tactic.
The English critic Benedict Nightingale discussed and compared great classical actors of the long dead past, and the present, and their magical effects upon audiences, in this 1983 article from the New York Times, available online

Performing arts include acrobatics, busking, comedy, dance, magic, music, opera, film, juggling, marching arts, such as brass bands, theatre, and circus arts.
Artists who participate in these arts in front of an audience are called performers, including actors, comedians, dancers, musicians, and singers. Performing arts are also supported by workers in related fields, such as songwriting and stagecraft.
Performers often adapt their appearance, such as with costumes and stage makeup, etc.
There is also a specialized form of fine art in which the artists perform their work live to an audience. This is called Performance art. Most performance art also involves some form of plastic art, perhaps in the creation of props. Dance was often referred to as a plastic art during the Modern dance era.