EXCLUSIVE: 20th Century Fox has rounded out the cast of X-Men: First Class, and the big surprise is that Mad Men star January Jones has been signed to play the role of Emma Frost, the gorgeous mutant with telepathic powers. At the same time, director Matthew Vaughn has set Zoe Kravitz to play Angel; Salvadore; Jason Flemyng will play Azazel, the father of Nightcrawler; Bill Milner to play the young version of Magneto (Michael Fassbender), and Morgan Lily to play the Young Raven. They join Fassbender, James McAvoy (Xavier), Nicholas Hoult (Beast) Jennifer Lawrence (Mystique), Caleb Landry Jones (Banshee), Lucas Till (Havoc), Edi Gathegi (Darwin), who round out the mutant contingent. Kevin Bacon is playing the villain, Rose Byrne will play McAvoy’s love interest Moira MacTaggert, and Oliver Platt is playing The Man in Black. Production begins August 23 in London.

UTA client Jones, who plays Mad Men‘s Betty Francis — the recently divorced wife of Don Draper (Jon Hamm) — will emerge from that 1960s setting to play Emma Frost, the mutant also known as the White Queen. While speculative reports had Alice Eve playing that role, no deal was concluded. Mad Men wraps its fourth season in early September, and she will be able to jump right into the role. Jones received her first Emmy nomination for Lead Actress in a Drama, for Mad Men.

Kravitz (the daughter of singer and Precious star Lenny Kravitz) is set to star in the upcoming George Miller-directed Mad Max: Fury Road; Flemyng most recently starred in Kick-Ass, Milner is best known from Son of Rambow and Lilly’s credits include Flipped and 2012.