Nineteen guests attended the intimate ceremony, including the mothers of the brides. Ellen has said she will air "a tiny bit" of the nuptials on her hit daytime talk show.
California legalized gay marriage in May, and although opponents have gathered enough signatures to put a measure to reverse the ruling on the November ballot, Hollywood is throwing its support behind the couple.
"One of my favorite people of all time is Ms. Ellen DeGeneres," Katherine Heigel told AP Television on Saturday night.
"So I wish all the best, all the happiness, all the joy that comes with that certificate...just the joy of being able to stand up and say that. In front of everyone you love and care about in front of each other and to walk away legal is huge."
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