Eric Dane, the celebrated actor best known for his roles on "Grey's Anatomy" and "Euphoria" and who later in life became advocate for ALS awareness, died Thursday. He was 53. His representatives said Dane died from amyotrophic lateral sclerosis, known also as Lou Gehrig's disease, less than a year after he announced his diagnosis."He spent his final days surrounded by dear friends, his devoted wife, and his two beautiful daughters, Billie and Georgia, who were the center of his world," said a statement that requested privacy for his family.