Leonardo DiCaprio has been sued for $45 million by a man who says the “Titanic” star incited a friend to hit him after he told DiCaprio to leave his actress girlfriend alone. Roger Wilson, 41, claims in the lawsuit filed this week that he was attacked outside a restaurant March 4, 1998, after confronting DiCaprio and a friend, Jay Ferguson, over alleged phone calls to Wilson’s girlfriend Elizabeth Berkley, who starred in “Showgirls.” Wilson, who appeared in two “Porky’s” movies, contends a drunken Ferguson told him it was he who called Berkley, and Ferguson invited Wilson outside. An intoxicated DiCaprio then “turned to his posse” and told them to beat up Wilson, court papers contend. Wilson lawyer Paul Licalsi says his client was hit once before the attacker was pulled away outside New York’s Asia de Cuba restaurant. Through his lawyer, DiCaprio denied the allegations.