Eric Dane, an actor best known for playing Dr. Mark Sloan, aka "McSteamy," on "Grey's Anatomy," discussed his health challenges after being diagnosed with ALS.

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.

Eric Dane reveals why his ALS diagnosis makes him "angry" as a dad of two teenage girls in his first sit-down interview after publicly revealing his ALS diagnosis. The 'Grey's Anatomy' alum shares his daughters,