Will Smith has publicly apologised to Chris Rock after he slapped him at the Oscars.

Writing on Instagram, Smith said his behaviour was unacceptable and inexcusable.

“I would like to publicly apologise to you, Chris. I was out of line and I was wrong.”

It comes after the Oscars film academy condemned Smith over the incident and announced a formal review.

“My behaviour at last night’s Academy Awards was unacceptable and inexcusable. Jokes at my expense are a part of the job, but a joke about Jada’s medical condition was too much for me to bear and I reacted emotionally.”

Will also apologised to the Academy and the Williams family.

“I deeply regret that my behaviour has stained what has been an otherwise gorgeous journey for all of us,” he wrote.