Two Marvel universes are set to collide.

ABC announced today that Jamie Alexander, who portrayed Lady Sif on the big screen in both Thor movies, will appear on an upcoming episode of Marvel’s Agents of SHIELD Season 1.

Network President Paul Lee told reporters at the Television Critics Association press tour that Lady Sif’s role will be “integral” to her episode.

He also promised that Clairvoyant's identity will be revealed this year and that producers have a “very cool” plan for the back half of the season.

The drama returns with new episodes on February 4. Watch Agents of SHIELD online to catch up until then.

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.