Sandra Oh, Kyle Silverstein, Kevin McKidd Sandra Oh, Kyle Silverstein, Kevin McKidd

Cristina and Owen have finally come to a comfortable place in their relationship on Grey's Anatomy  — which naturally means it may be time for another shakeup.

The couple has certainly seen some rough times over the past few seasons, but following their divorce, Cristina (Sandra Oh) and Owen (Kevin McKidd) decided to keep things simple by not defining their relationship. Remarkably, that has seemed to work from them thus far.  "I don't know if it's better for them, but they're in the midst of believing that," executive producer Shonda Rhimes tells "They're not talking about it and not defining it so they don't have to talk about all the reasons why it didn't work in the first place."

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