Sarah Drew had to keep her Grey's Anatomy return a secret "for a little while"

ETonline

"I didn't fully believe it was happening until I literally signed the contract, which didn't come until a while after the initial conversations," Drew tells ET. "It started with an initial conversation, and I was like, 'This sounds interesting, the story sounds interesting.' But you never know if the storyline is going to change or they're going to change their mind, so I didn't really settle into the reality that it was happening until I knew 100 percent it was happening. Then, by that point, I was about to show up on set and so it was like, 'I can't wait to see everyone!'" ALSO: Drew would be willing to return again: “I felt so loved and so missed.”