Kiefer Sutherland: Engaged to Siobhan Bonnouvrier?

He’s been down the aisle twice before, and now it looks like Kiefer Sutherland is looking to take the plunge for a third time.

The “Lost Boys” actor’s girlfriend Siobhan Bonnouvrier was spotted sporting a snazzy sparkler on her left hand ring finger during a recent dinner out in Portofino, Italy.

The possible engagement isn’t really a shocker, as Sutherland has indicated in the past that he’s definitely serious about Siobhan.

An insider explained, “Kiefer believes in his heart that Siobhan is his soul mate. Even though he’s been married twice before, he says that he’s never felt so strongly about a woman. He even persuaded producers to move the set of 24 from the West Coast to New York because he can’t stand to be away from her.”

Enjoy the pictures of Kiefer Sutherland and Siobhan Bonnouvrier vacationing in Portofino (August 21).