A Los Angeles County Superior Court commissioner granted De Rossi's request to change her last name in a closed hearing Thursday. She will now be known as Portia Lee James DeGeneres.
DeGeneres tweeted the news Thursday: "I just got some amazing news. The court has granted Portia's name change. She's now officially Portia Winfrey," she joked.
Portia, best known for Arrested Development, asked for a name change last month. She and Ellen wed in August 2008, during a five-month period when same-sex marriage was legal in California.