Kate Walsh Returning To 'Grey's Anatomy' As Dr. Addison Montgomery In Season 18

Paging Dr. Montgomery! Kate Walsh is officially returning to "Grey's Anatomy" for Season 18. The actress announced the big news to fans in a video posted on the hit drama's social media channels. "Dr. Addison Montgomery is coming back to Grey Sloan Memorial Hospital, and I'm so excited to be home again joining Shonda, Ellen and the rest of the incredible cast," she said.