A FURIOUS Will Smith stormed the Oscar stage and slapped presenter Chris Rock after the comedian made a poorly-received joke about Jada Pinkett Smith's hair loss.

The ex-SNL comedian was there to present an Oscar for Best Documentary when he appeared to go off-script.

Jada, I love you, G. I. Jane 2, can't wait to see it," Chris tried to joke.

Demi Moore famously shaved her head for her role in the 1997 movie.

Jada, on the contrary, has been struggling with hair loss for years, and last year decided to shave it all off.

Her husband, Will, took offense at the joke and stormed the stage before hitting the presenter with a right hook.