Actor Eric Dane has opened up about his battle with amyotrophic lateral sclerosis (ALS) and is revealing the one symptom — the very first one — he experienced, but didn’t think much of at the time it happened. The former “Grey’s Anatomy” star, 52, revealed this important fact to Diane Sawyer in a new interview on “Good Morning America” Monday.

Eric Dane is opening up about his ALS diagnosis, two months after he publicly shared his health news with the world. The “Grey’s Anatomy” star, who is 52, said in a new interview with Diane Sawyer on “Good Morning America” that he originally dismissed his initial symptoms.

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.