Now, however, the actor has shared a few more sobering updates about his health on Good Morning America. “My right side has completely stopped working,” he told the program. Dane said that he expects to lose control of the left side as well.

Dane -- who shot to fame amid six seasons on the hit ABC drama "Grey's Anatomy," where he played Dr. Mark Sloan, affectionately known as "McSteamy" -- said his symptoms began over one year ago, when he began to experience weakness in his right hand.

Dane is set to share intimate details about his diagnosis in a new "Good Morning America" interview with Diane Sawyer.

The 'Grey's Anatomy' and 'Euphoria' actor spoke to Diane Sawyer alongside his doctor to explain how he plans to fight against the incurable disease.

I will never forget those three letters. It’s on me the second I wake up. It’s not a dream,” he told Diane Sawyer.

Eric Dane and his doctor discussed his ALS diagnosis, symptoms and the rise in causes during an emotional 'Good Morning America' interview

The San Francisco-born star of ‘Grey’s Anatomy’ and ‘Euphoria’ has been on Good Morning America this week to discuss the frightening realities of amyotrophic lateral

Laura Gaynor captured this incredible video as a tornado tore across a road in Nebraska on June 16. Andrew Pihlbald, 45, who coaches a U17 boys' soccer team from Jamestown, collapsed after going into cardiac arrest during the second half of a June 4 match at Wilson High School in Wilson, New York.

Euphoria’ actor Eric Dane has been in some excellent shows and movies — here are our top three favorites for you to check out now

Eric Dane is not backing down from his fight against ALS. The 52-year-old sat down with ABC News' Diane Sawyer in an interview for Good Morning America, where he revealed his first symptoms of the debilitating disease and how he plans to slow the effects.

In a June 16 interview with Good Morning America's Diane Sawyer, Eric Dane opened up about his reconciled relationship with wife Rebecca Gayheart. The 'Euphoria' actor said they have "managed to become better friends and better parents,