Walsh will play the mother of Hannah, a teen who — before committing suicide — send a box of audiotapes to her classmates, telling them the roles they played in her death, our sister site Deadline reports.
Based on the 2007 young-adult novel by Jay Asher, 13 Reasons Why follows Clay (played by Dylan Minnette, Scandal) as he receives the box of tapes and instructions to pass them along to 12 other students. The project got a straight-to-series, 13-episode order from the streaming video service in October.
Gomez executive-produces the drama along with mom Mandy Teefey, Kristel Laiblin and Anonymous Content.
Derek Luke (Empire, Rogue) also joins the cast as guidance counselor Mr. Porter.
Walsh’s TV resume includes Private Practice, Grey’s Anatomy, Fargo, Full Circle and Bad Judge.