Take another look @ revealing images of actress Jaimie Alexander, aka Marvel Studios' 'Asgardian' warrior 'Sif' in a recent issue of "Shape" magazine:
She then played the character 'Jessi' on the ABC Family series "Kyle XY",followed by guest roles on "CSI: Miami" and "Bones".
Alexander was cast as 'Sif' in Marvel Studios' live-action feature "Thor, directed by Kenneth Branagh, released May 2011...
...then reprised the role in the sequel "Thor: The Dark World" and the TV series "Marvel's Agents Of S.H.I.E.L.D."
Click the images to enlarge...