Kathryn Hahn Joins Will Ferrell, Paul Rudd in Apple's 'Shrink Next Door'

Kathryn Hahn

Apple is adding to the cast of its limited series The Shrink Next Door.

Kathryn Hahn will star with Will Ferrell and Paul Rudd in the eight-episode series, based on the popular Wondery podcast of the same title. Hahn has worked with the two leads several times in the past, appearing with both in Anchorman, Ferrell in Step Brothers and Rudd in Our Idiot Brother and NBC's Parks and Recreation.

The Shrink Next Door is based on a true story and centers on the relationship between psychiatrist to the stars Dr. Isaac "Ike" Herschkopf (Rudd) and one of his patients, Martin "Marty" Markowitz (Ferrell). Over the course of their relationship, the all-too-charming Ike slowly inserts himself into Marty’s life, even moving into his Hamptons home and persuading Marty to name him president of the family business. The series explores how a seemingly normal doctor-patient dynamic morphs into an exploitative relationship filled with manipulation, power grabs, and dysfunction at its finest.

Hahn, who's coming off HBO's I Know This Much Is True and WandaVision at Disney+, will play Marty's younger sister, Phyllis.

Civic Center Media produces The Shrink Next Door in association with MRC Television, Gloria Sanchez Productions, Semi-Formal Productions, Wondery and Bloomberg Media.

Georgia Pritchett (Succession, Veep) is writing the series, with Michael Showalter (The Lovebirds, The Big Sick) directing. They executive produce with Rudd; Ferrell, Jessica Elbaum and Brittney Segal for Gloria Sanchez Productions; Jordana Mollick for Showalter's Semi-Formal Productions; Marshall Lewy for Wondery; and Jared Sandberg, Katie Boyce, and Francesca Levy for Bloomberg Media. Podcast host Joe Nocera is a co-EP.

Hahn's recent credits also include Apple's Central Park, HBO's Mrs. Fletcher and Amazon's Transparent. She is repped by Gersh, Lighthouse Management and attorney James Adams of Schreck Rose.

MRC Television shares a parent company with The Hollywood Reporter.