Christina Applegate has joined Lisa Kudrow's comedy show Web Therapy.

According to Entertainment Weekly, the actress will have a multi-episode guest role in the Showtime comedy about a self-consumed therapist who counsels her patients via video.

Applegate will play Jenny Bologna, a public relations "fixer" who offers to help Fiona Wallice (Kudrow) after a damaging NSA scandal.

However, Jenny harbours a shocking secret that will rock Fiona's world.

Season four of Web Therapy, which will also feature guest roles by Gwyneth Paltrow, Jon Hamm, Matthew Perry, Calista Flockhart, and Allison Janney, returns on October 22.