'Thor' cast adds Alexander, Feore

Jaimie Alexander and Colm Feore have joined the cast of Kenneth Branagh's Thor, says The Hollywood Reporter.

Alexander (Kyle XY) will play Asgardian warrior Silf, a love interest to the eponymous god of Thunder, while Feore (24) is expected to take on an antagonistic role.

Already among the cast are Chris Hemsworth as Thor, Tom Hiddleston as villain Loki and Natalie Portman as nurse Jane Foster.

Thor is based on the long-running Marvel Comics series devised by Stan Lee, Larry Lieber and Jack Kirby. The movie is expected to arrive in May 2011.