is getting a new cast member. Peter Gallagher will be joining the long-running medical drama in the show's upcoming 18th season.Gallagher has been cast as a recurring character in a major arc of the new season, a rep for ABC confirmed to ET on Thursday.Gallager is set to play Dr.
Alan Hamilton, who shares a history with Dr. Ellis Grey (Kate Burton), the late mother of Meredith Grey (Ellen Pompeo). Dr. Hamilton's path will cross with Meredith's in the season 18 premiere.Deadline was the first to report the news.It was recently announced that Burton is set to reprise her role as Dr.
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