Ellen DeGeneres and Portia de Rossi have tied the knot.

“Ellen DeGeneres and Portia de Rossi were married tonight in an intimate ceremony at their home in Los Angeles,” their spokesperson tells PEOPLE exclusively.

DeGeneres, 50, and de Rossi, 35, both wore Zac Posen and exchanged rings by Neil Lane during the Saturday ceremony. Their big day also featured arrangements by L.A. florist Mark’s Garden.

The intimate ceremony was attended by 19 guests, including DeGeneres’s mom Betty and de Rossi’s mother Margaret Rogers (who flew in from Australia for the occasion), who witnessed the couple exchange handwritten vows.

The couple have been dating since December 2004. DeGeneres announced her plans to wed de Rossi during a taping of her talk show in May after California’s Supreme Court ruled a previous ban on gay marriage to be unconstitutional.

The following month de Rossi showed off a 3-carat diamond ring set on a pink pavé band DeGeneres presented to her for their upcoming nuptials when the pair attended the Daytime Emmy Awards together.

“She’s taught me lessons about myself, and I feel like I’ve taught her,” the TV host said of de Rossi last year. “We’ve both changed and grown, and we just feel like, ‘Oh, okay, this is completion.’”

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