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.

ALS has robbed Eric Dane of functioning in his right arm and is creeping through his left, the veteran actor said in an emotional interview about the diagnosis he revealed in April.

Eric Dane said he cannot hide from the fact that he has ALS. “I wake up every day and I’m immediately reminded that this is happening,” the recently diagnosed “Grey’s Anatomy” alum told Diane Sawyer in an interview preview shared Thursday. (Watch the video below.) “It’s not a dream,” Sawyer said.