May 26, 2011 03:00 PM

Peter Kramer/AP

Pretty in purple!

January Jones stylishly shows off her growing belly in a dress by Preen Wednesday at the New York premiere of her upcoming mutant movie, X-Men: First Class, out June 3.

“I haven’t [had any odd cravings] yet,” the expectant actress, 33, tells PEOPLE. “It’s a bummer. I wish I had something weird to tell.”

Jones, who stars as Betty on Mad Men, announced her pregnancy in April.

RELATED: January Jones ‘Feeling Great’ About Pregnancy

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