If you thought Betty Draper was an icy blonde, you ain't seen nothing yet!

Actress January Jones has swapped her prissy (but oh-so-covetable) "Mad Men" fashions for a superhero look straight out of "Dr. Zhivago."

Jones, who plays mutant Emma Frost in the prequel "X-Men: First Class," hit the film's British set in a dramatic all-white fur hat, cape, gloves, knee-high boots, and tights, while her blonde locks hung loose.

Poor girl -- she just can't get out of the '60s.

Compared to comic drawings of the telepathic mutant Frost, who can turn herself into a diamond, this retro-style costume -- which also recalls a look worn by Angelina Jolie in "Salt" -- is pretty tame.

Maybe she's saving the corset crop top for later?

Meanwhile, check out Jones and her "Mad Men" cast mates on the cover of Rolling Stone.