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,

Dane is set to share intimate details about his diagnosis in a new "Good Morning America" interview with Diane Sawyer.

Eric Dane opened up about his recent ALS diagnosis on "Good Morning America," telling Diane Sawyer that he now only has "one functioning arm."