Jackass star Steve-O is facing more legal troubles - a security guard is suing him over an alleged assault at the launch of Paris Hilton's clothing line.

Doorman Roland Cano was hired to work at the Kitson store in Los Angeles in August 2007 to provide extra security while Hilton unveiled her fashion range. Cano has accused Steve-O - real name Stephen Glover- of attacking him when he was denied access to the event. Glover was reportedly filming reality show Dr. Steve-O at the time and Cano has also named TV network NBC and the star's bodyguard in the suit, which was filed at L.A. County Superior Court on Tuesday.

Cano alleges in the papers that Glover "without provocation, violently punched (his) head repeatedly" and is suing the stuntman for unspecified damages, according to TMZ.com.

Glover will soon be forced to enter rehab after entering a guilty plea to felony drug charges relating to an incident in March in which he allegedly vandalized a neighbor's property.

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(This news article provided by World Entertainment News Network)