The actress will recur on the freshman dramedy as an alluring and intense love interest for Hartley’s character, frustrated sitcom actor Kevin.
Montgomery’s Erin is described as a talented and tart-tongued theater actress “whose fierce commitment to ‘honesty’ sucks poor Kevin into her darkness,” EW.com reports. This Is Us premieres Tuesday, Sept. 20 at 10/9c; Montgomery first appears in Episode 4.
Per NBC’s official synopsis, This Is Us — which also stars Mandy Moore (Red Band Society), Milo Ventimiglia (Gilmore Girls), Sterling K. Brown (The People v. O.J. Simpson) and Chrissy Metz (American Horror Story) — centers on a group of people share the same birthday and “more than anyone would expect” as their “life stories intertwine in curious ways.”
Montgomery currently headlines WGN America’s Salem, which returns for Season 3 in November, and previously starred in Entourage, Made in Jersey and Human Target.