Actor Christian Slater's wife Ryan Haddon has been arrested after she allegedly threw a glass at the actor during a fight in a Las Vegas hotel room.

Police say Slater received 20 stitches to the back of his head after the incident, but did not press charges.

Haddon, a TV producer, was arrested on a misdemeanour charge of domestic battery and was released without bail after a mandatory 12-hour detention.

Slater, the star of films such as 'Windtalkers' and 'True Romance', later claimed the incident was a misunderstanding. "She went to throw a glass of water at his face as a joke," a friend of the star told the New York Post.