 She also has had guest roles on the show "" where she played Jenna York, a flight attendant involved in a murder case; and in "Bones" where she played Molly Briggs, a student connected to the victim of the episode.In September 2009, it was reported that Alexander would portray Sif in the live-action superhero film, "Thor", directed by Kenneth Branagh and released in May 2011.She reprised the role in the sequel "", released in November 2013.