HBO drama pilot Westworld continues to fill out its cast, adding X-Men veteran James Marsden and Eddie Rouse in key roles. Starring Oscar winner Anthony Hopkins and Evan Rachel Wood, the project hails from J.J. Abrams’ Bad Robot, Person Of Interest creator Jonathan Nolan, writer Lisa Joy, producer Jerry Weintraub and Warner Bros TV. Inspired by Michael Crichton’s 1973 sci-fi movie set at an amusement park, the project is described as a dark odyssey about the dawn of artificial consciousness and the future of sin. Marsden, repped by WME and Sean Elliott at Authentic, will play Teddy Flood, a mysterious new arrival to a small frontier town who quickly proves both his charm, and his talent, with a revolver. Rouse will play Kissy (short for Kisecawchuck), an American Indian who deals cards, and contraband, from the town saloon, making him an expert in games both on and off the card table.

Also booked roles in Westworld are Demetrius Grosse (Banshee, Justified), Kyle Bornheimer (She’s Out of My League, Bachelorette), Currie Graham (Murder in the First, NYPD Blue), Lena Georgas (Prime Suspect, Ray Donovan), Steven Ogg (Grand Theft Auto V) and Timothy Lee DePriest.

Marsden will be seen in upcoming features The Best Of Me, D-Train and Business Trip. Rouse’s credits include the features Being Flynn, Sundance Award-winning short Rat Pack Rat, Pandorum and American Gangster.