Ellen's New Squeeze: Portia de Rossi
De Rossi, 31, also recently became single after splitting with her girlfriend of three years, singer-songwriter Francesca Gregorini, 31, who is the stepdaughter of former Beatle Ringo Starr.
Although DeGeneres, 46, and de Rossi, who was once featured on Ally McBeal, have been acquainted for some time, their romance came to light at the VH1 Big in '04 awards ceremony in Los Angeles on Dec. 1.
An onlooker reports, "Ellen and Portia seemed totally into each other. Their body language was intense." A spokesman for de Rossi wouldn't discuss her personal life. DeGeneres's rep refused to comment.
DeGeneres and Hedison, 35, met through mutual friends in 2000.