Dominic Monaghan and Daniel Henney have joined the cast of Fox's spinoff "X-Men Origins: Wolverine" says the trades.

Set 17 years before the "X-Men" movies, it traces the origins of the popular Marvel Comics mutant superhero also known as Logan.

Monaghan will play Barnell, a mysterious former military ally of Logan with the power to harness energy and electricity.

Henney will play Agent Zero, a fellow member of the Weapon X program and an expert tracker with lethal, mutant-enhanced marksman skills.

Liev Schreiber, Danny Huston, Taylor Kitsch, will.i.am, Lynn Collins and Ryan Reynolds also star. David Benioff wrote the screenplay whilst Gavin Hood directs.

Production began this month in New Zealand before moving to Australia whilst a New Orleans shoot is also planned.