Wedding bells will be ringing this weekend for Ellen DeGeneres and her fiancée Portia de Rossi. "Their wedding is definitely happening [Saturday]," an insider told Page Six. "Twenty people were invited." The lovely Portia "is wearing a flowing, form-fitting dress by Zac Posen." The blonde duo have been dating sing December of 2004 and announced in May on Ellen's talk show that they would marry. "It's something that we've wanted to do and we want it to be legal and we are very, very excited," Ellen said on the show. She's also called Portia her "perfect fit." Aww!