Amy Acker (The Gifted, Angel) has been cast as the late Derek’s Shepherd’s fourth sister in Grey’s Anatomy’s upcoming Season 15, Entertainment Weekly has confirmed.
The character will be introduced in a Season 15 episode that will revolve around Derek’s other sister, Amelia (Caterina Scorsone).
The two other Shepherd sisters, Liz and Nancy, have been played by Neve Campbell and Embeth Davitz, respectively.
Next season will be the 15th season of Grey’s Anatomy, which is ABC’s longest-running primetime drama series.