Paris Hilton's younger brother is in hospital after getting into a bust-up.

Barron Hilton, 25, was reportedly involved in a violent altercation with former 'Baywatch' star Jeremy Jackson at her mansion in Malibu, California early this morning (13.07.14) and is still undergoing medical treatment.

A source close to the 33-year-old socialite told gossip website that the actor, who played Hobie Buchannon on the TV series, walked into her house uninvited with five or six friends and were immediately asked to leave by her close friend Brandon Davis, but Jeremy allegedly went ballistic, saying: ''Don't you know who I am? I was on 'Baywatch' and 'Celebrity Rehab.' ''

The insider claims Jeremy then grabbed another guest and started choking him, causing several other people to jump in to subdue him.

Barron was bleeding after the incident and is still in hospital after getting stitches to a wound.

The source also claims that Jeremy broke something off Paris' car outside the property as he was leaving.

But the actor, 33, says he was the victim and someone smashed a glass bottle over his head during the fight.

Police were called to the scene but no one was arrested, as nobody wanted to press charges.

Barron previously claimed he was beaten up in an attack ordered by Paris' former friend Lindsay Lohan at a house party in Miami, Florida in December.