She will recur as a theater actress who is romantically involved with Justin Hartley's Kevin

By Dan Snierson
August 19, 2016 at 12:00 PM EDT
David Livingston/Getty Images

This Is Us has found a rather fitting actress to cast a spell on Justin Hartley.

Janet Montgomery, who stars on Salem as (resurrected?) witch Mary Sibley, has signed up for a recurring role on NBC’s new dramedy from Dan Fogelman about people connected by their birthday, EW has learned. Montgomery will play an alluring and intense love interest for sitcom actor Kevin (Justin Hartley). Named Erin Maine, her character is described a talented, tart-tongued theater actress “whose fierce commitment to ‘honesty’ sucks poor Kevin into her darkness.”

Montgomery — whose TV credits include Black Mirror, Downton Abbey, Entourage, Made in Jersey, and Human Target — makes her first appearance in the show’s fourth episode.

Also joining the This Is Us guest roster in recent weeks are: Katey Sagal, who plays Kevin’s agent; Brad Garrett, who plays the president of the network that airs Kevin’s show, The Manny; and Jon Huertas, who will recur as the best friend of Jack (Milo Ventimiglia).

This Is Us premieres Sept. 20 on NBC, while Salem‘s third season debuts in November on WGN America.