Portia de Rossi and Ellen DeGeneres by Frank Micelotta/Getty Images
Portia De Rossi
will tie the knot this weekend, multiple sources have confirmed.
The two will exchange vows on Saturday in an intimate ceremony in Los Angeles,
How intimate? Only 20 people were invited, according to
The New York Post
"Their wedding is definitely happening," a source told the
. "Portia is wearing a flowing, form-fitting dress by Zac Posen."
The longtime couple announced their plans to wed in May, shortly after California's Supreme Court lifted the ban on gay marriage, stating that people have a fundamental "right to marry" whomever they choose.
DeGeneres, 50, made the announcement on her daytime talk show.
"I'm very excited," she told her audience.
The comedienne and De Rossi, 35, began dating in December 2004.