The actor's body: physicality and body language in acting

The actor is the only artist whose instrument is themselves. A musician can leave their instrument in its case; the actor carries theirs everywhere, and that instrument is the body. Yet many actors —especially those trained in heavily text-focused traditions— neglect physical work and are left with a half-tuned instrument.

Physicality is not physical fitness or appearance: it is the conscious, expressive relationship with one's own body. It is the ability to inhabit space in a particular way, to communicate inner states through movement and posture, to build characters from the body inward rather than only from the inside out.

The body as a first language

Before an actor delivers their first line, the audience has already formed an opinion about the character based solely on how they enter the scene, how they occupy space and how they relate physically to others. This pre-verbal language is as powerful —or more so— than words.

Studies of non-verbal communication indicate that between 60% and 70% of the information in a human interaction is conveyed through the body. For the actor, this has a direct implication: if your body says something different from what the text says, the audience will believe the body.

Posture as characterisation

Posture is one of the most immediate elements in the physical construction of a character. It radically changes how the character is perceived before they say a single word:

• The spine: A character with an upright spine projects power, confidence or arrogance. One with a sunken spine projects defeat, shyness or exhaustion. The same text sounds completely different from each posture.
• The shoulders: Shoulders back and down signal openness and assurance. Forward and up, protection or tension. Asymmetrical, specific tension or an eccentric personality.
• The centre of gravity: A character with their weight on their heels is more passive and observant. One with their weight on the balls of their feet is more active, more on the attack. This single variable changes the energy of the whole performance.
• The jaw: Tense or loose, high or low, the jaw reflects the character's level of emotional control. It is one of the hardest parts of the body to control consciously and therefore one of the most revealing.

Gesture: expressive vs. illustrative

There are two types of gesture the actor must distinguish clearly:

Illustrative gestures

These are gestures that "draw" what the text says: pointing upward when you speak of the sky, moving your hands as if driving when you talk about cars. They are informative but rarely dramatic. In excess, they come across as childish and divert attention from the text.

Expressive gestures

These are gestures that communicate the character's inner state independently of the text. A hand slowly closing while the character smiles can communicate a contained threat that the words do not express. A finger drumming on the table while the character listens can reveal impatience or nervousness the character is trying to hide. These gestures add layers of meaning to the text.

The goal is to develop a rich repertoire of expressive gestures and reduce illustrative ones to the strictly necessary.

Body training disciplines for actors

An actor's physical work draws on many disciplines. These are the most valuable, and the specific reasons why they are worth your time:

• Alexander Technique: Works on the relationship between the head, neck and spine to release habitual tensions and recover a more open, natural presence. Especially useful for actors with physical blocks or deeply ingrained postural habits.
• Eutony: A body-awareness technique developed by Gerda Alexander that works on muscle tone and the relationship with space. It develops a physical sensitivity that is very useful for characters requiring specific physical states.
• Corporeal mime (Decroux method): Develops segmental control of the body and the ability to tell stories without words. Transformative for actors who want to expand their expressive vocabulary.
• Yoga and pilates: These are not stage techniques but they develop the body awareness, flexibility and functional strength that underpin any more specific physical work.
• Contemporary dance: Develops the relationship with space, rhythm and movement as a form of narrative expression.

The body on camera vs. the body on stage

The scale of physicality changes depending on the medium. In theatre, movement and gesture must project all the way to the back row: the scale is larger. On camera, especially in close-up, a millimetric movement —a slight tremor of the lower lip, a micro-movement in the eyes— can have the same impact as a grand theatrical gesture. Actors who work well in both media have developed the ability to adjust the scale without losing the truth.

The body is the most powerful of the actor's instruments, but it is also the most overlooked. Actors who invest in physical work find that their range expands enormously and that characterisation becomes more specific, more surprising and more convincing.