Oona Chaplin (“Game of Thrones”) is set to star in the Spanish thriller Purgatorio. Chaplin, the great granddaughter of Charlie Chaplin, will play a woman who agrees to babysit a neighbor’s creepy kid. Things go bad when the neighbor never returns, and the child claims to see a mysterious boy in the house.

According to Variety, the role marks Chaplin’s first gig as lead actress. The film is directed by Catalan Pau Teixidor for Apaches Entertainment, and co-stars Andres Gertrudix (The Orphanage), Ana Fernandez (“Talk to Her”), and Sergi Mendez (“Hispania , la Leyenda”).

Chaplin held bit parts in the insanely awesome Saddam Hussein drama The Devil’s Double and the James Bond actioner Quantum of Solace. She is best known, however, for her tragic role as Robb Stark’s pregnant wife Talisa Maegyr on HBO’s “Game of Thrones.”