Dempsey joined Grey's in 2005 instantly becoming McDreamy Derek Shepherd. Before that he had a role in The Practice (2004) - also as a doctor - as well as a part in Once and Again (2000-2002) as Aaron Brooks. He was known more for movies than television until Grey's.
Did you say it? 'I love you. I don't ever want to live without you. You changed my life.' Did you say it? Make a plan. Set a goal. Work toward it, but every now and then, look around; Drink it in 'cause this is it. It might all be gone tomorrow."