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\"I'm back in uniform and that can only mean one thing,\" Walsh wrote in the caption.

Walsh teased that fans should \"stay tuned,\" leading some to wonder if she will be back for more than one episode or in a more permanent capacity.

This isn't the first time Walsh has returned to \"Grey's Anatomy\" since her character departed for her own series, \"Private Practice,\" in 2007. The spin-off ran for six seasons, ending in 2013.

Walsh has been back as Addison for a handful of episodes over the years and even appeared earlier this season in two episodes from October 2021.

\"Grey's Anatomy\" is currently in season 18 and has been renewed for a nineteenth season.

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