Eric Dane, appearing on today’s Good Morning America, said in a taped interview with Diane Sawyer that due to ALS he no longer has use of his right arm and that he expects to lose use of his left hand.

Eric Dane opened up about his recent ALS diagnosis on "Good Morning America," telling Diane Sawyer that he now only has "one functioning arm."

The "Euphoria" and "Grey's Anatomy" star, who revealed his diagnosis last Tuesday, sat down with "Good Morning America" to talk about his incurable condition.