On 'Good Morning America,' Eric Dane opens up to Diane Sawyer about living with ALS, aka Lou Gehrig's Disease, a degenerative nerve condition that affects one's ability to control their muscles.

It's been a sobering journey for Eric Dane since being diagnosed with ALS. The Grey's Anatomy alum sat down with Diane Sawyer on Good Morning America in his first TV interview since revealing his diagnosis in April,

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.