Lizzy Caplan Joins Seth Rogen, Joseph Gordon-Levitt in Christmas Eve Comedy

"50/50" helmer Jonathan Levine is directing the film.

Masters of Sex star Lizzy Caplan will joinSeth Rogen and Joseph Gordon-Levittin the Untitled Christmas Eve Movie.

Rogen and Gordon-Levitt's 50/50 directorJonathan Levine is helming Sony's new comedy, which he also wrote.

Anthony Mackie is also starring in the film, which revolves around three childhood best friends who reunite in New York City for their annual tradition of going out on Christmas Eve.

Caplan will play Diana, a love interest to Gordon-Levitt's character.

Rogen and Evan Goldberg's Point Grey Pictures is producing along with Good Universe. Production starts next week in New York City.

Caplan stars on the TV series Masters of Sexand will next be seen on the big screen with Rogen in The Interview. She's repped by WME, Mosaic and Jackoway Tyerman.