Former Grey's Anatomy star Eric Dane is speaking out for the first time in a television interview about his battle with ALS, a degenerative neurological disorder.
"I wake up every day and I'm immediately reminded that this is happening," Dane, 52, said in an interview with Diane Sawyer that aired Monday on Good Morning America. "It's not a dream."
ALS, short for amyotrophic lateral sclerosis, is a degenerative neurological disorder where the symptoms worsen over time, according to the National Institutes of Health.
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.
Most recently, Dane portrayed Cal Jacobs, the head of the Jacobs family, on Euphoria. He is also starring in an upcoming series on Amazon Prime Video, a police thriller titled Countdown.
Tune into "Good Morning America" on Tuesday, June 17, from 7 a.m. to 9 a.m. EDT, for more of Diane Sawyer's interview with Eric Dane.