British actress 'Alice Eve', whose name has been connected to a potential Marvel film for some time now, reportedly(via Deadline) is in negotiations to appear in Matthew Vaugn's prequal, 'X-Men: First Class, as the White Queen, Emma Frost.
Rosamund Pike, who was once rumored for the role, apparently screen-tested for 'Emma Frost', but was beat by Eve. Alice Eve was also connected to star as female lead in Marvel Studios'
Captain America: The First Avenger, but eventually went to Hayley Atwell.
The 28 year old actress joins Michael Fassbender as Magneto and James McAvoy as Professor X in the story that focuses on Marvel's superpowered team X-Men in a younger incarnation than the previous trilogy.
Originally a villain as "White Queen" in the comics, Emma Frost was a member of the 'X-Men' as a mutant of enormous telepathic ability, and is also capable of transforming into an organic diamond state with enhanced strength and durability which suppresses her telepathy.