Kevin McKidd and Sandra Oh

Who's taking over as the Chief of Seattle Grace? Who's moving in with Meredith and Derek? How will Teddy move on from Owen — or rather, with whom will she move on?

The cast of Grey's Anatomy answer those questions and others in our juicy Grey's season premiere gallery, which also includes a peek at Cristina's unconventional wedding dress. We also answer the ABC medical drama's biggest question: Who is the real power couple of Seattle Grace now?

Grey's Anatomy: Will Meredith and Derek be a happy couple this season?

Check out the gallery here, and sound off in the comments about which story line you're most looking forward to this season.

Grey's Anatomy returns Thursday, Sept. 23 at 9/8c on ABC.