Australian actor Sam Worthington has admitted he acted like "a jerk" on the night he was arrested for disorderly conduct in Atlanta, Georgia last year (12).

The Avatar star was taken into custody by police after he became involved in a bust-up with a bouncer outside a nightclub in the city in November (12).

Worthington, who was in town to shoot a movie, allegedly grew violent after he was denied entry to the venue, and is said to have been pepper-sprayed by a doorman before being hauled away in handcuffs.

The actor has now opened up about the incident, insisting he regrets his bad behaviour.

He tells Australia's News Limited network, "I was a jerk. It was my fault. I've admitted it. I was a jerk, I was in the wrong. Move on. That's it."

When asked if alcohol played a part in the drama, he added, "No, I was an a**!"

The charge against Worthington was subsequently dropped.