Euphoria's Eric Dane opened up about his ALS diagnosis, family support and emotional journey in a Good Morning America interview this June

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.

The Grey's Anatomy star shared an update on his Amyotrophic Lateral Sclerosis (ALS) diagnosis in an interview with Diane Sawyer.