Ellen DeGeneres and Portia De Rossi's Wedding Bells
Portia, 35, was in the studio at the time, and Ellen, 50, were applauded by audience members after the announcement was made on Thursday.
Ellen previously had a high-profile relationship with actress Anne Heche. In 1997, Ellen appeared on the cover of Time Magazine entitled, “Yep, I’m Gay”
The taped episode of Ellen making the announcement is said to air today, Friday.