Mary Lynn Rajskub and Matthew Rolph
National Photo Group
08/03/2009 AT 05:05 PM EDT
Mary Lynn Rajskub's has never been one to stick to convention, and the 24
star's wedding to personal trainer Matthew Rolph over the weekend at the Planet Hollywood Resort & Casino in Las Vegas was no exception.
The actress, wearing an ivory wedding gown with lace overlay by Nicole Miller, was walked down the aisle Saturday by the couple's 1-year-old son Valentine to Elvis's "A Little Less Conversation." The groom wore a white Hugo Boss suit.
"We didn't know that getting married at a casino in Vegas with Elvis could be so romantic," Rajskub tells PEOPLE exclusively. "Our wedding was beautiful, spontaneous and intimate."
After the ceremony, the couple and their 20 guests, among them It's Always Sunny In Philadelphia
costars and real-life husband and wife Kaitlin Olson and Rob McElhenney, continued the celebration into the wee hours at the restaurant Koi Las Vegas.
Rajskub, 38, and Rolph, 29, who met while she was performing a stand-up comedy gig, welcomed their son
on July 24 last year.
"We are so excited to officially be husband and wife," Rajskub adds.
The actress is currently shooting the eighth season of 24
and will next be seen in the feature film Julie and Julia
opening Friday. Rolph is the co-owner of Pilates Plus Malibu.