Remember the behind-the-scenes video hat debuted online last week from Entertainment Tonight’s set visit of Kenneth Branagh’s “Thor?” Well, it turns out the televised version differed slightly as it also included a quick sneak peak at Sif in action.

According to the Marvel lore, Sif is an Asgardian warrior and lover of Thor who often accompanies him in battle. She’s always been faithful in her affections of Thor or those that share his similar powers.

GeekTyrant received some screen shots of the missing scene that includes our first look at Jaimie Alexander as Sif. Have a gander below.

“Thor” is set to premiere May 6th 2011.

Source: GeekTyrant