Just months after revealing his ALS diagnosis publicly, actor Eric Dane speaks out for the first time in a interview with Diane Sawyer about the moment he first noticed the warning signs, and more.

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.

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,

Eric Dane is speaking out about his “sobering” experience with Amyotrophic Lateral Sclerosis (ALS), also known as Lou Gehrig’s disease. The Grey’s Anatomy alum first shared his diagnosis in April, writing at the time that he felt “fortunate that I am able to continue working and am looking forward to returning to set [sic] of Euphoria next week.”