Entourage's Kevin Dillon Weds

By Stephen M. Silverman

04/24/2006 at 05:00 PM EDT

Entourage actor Kevin Dillon married his girlfriend, model-actress Jane Stuart in Las Vegas on Saturday, his rep has confirmed to PEOPLE.

"The couple, who had been engaged for over a year, had been planning a formal wedding date, but Mr. Dillon’s schedule with Poseidon and Entourage had made it difficult," Dillon's spokesperson, Tiffany Kuzon, said in a statement.

"Entourage castmates Jerry Ferrara and Kevin Connolly were present at the ceremony."

Kuzon also said that the couple are expecting their first child this summer.

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Dillon, 40, and Stuart, 28, met through a mutual friend, began dating in 2004 and got engaged the following year. "I had to fight a little bit because she wasn't all that interested in me when I asked her out," Dillon told PEOPLE last year. "But she saw things my way eventually."

In HBO's hit comedy Entourage, which begins its new season in June, Dillon plays an obscure actor whose brother is an A-list celebrity – a role that spoofs his real-life relationship with older brother Matt.

Next month, Dillon will be seen in Poseidon, next month's big-screen remake of the ocean-disaster classic The Poseidon Adventure. He has also acted in the movie Platoon and on the TV shows 24 and NYPD Blue.