Calendar girl: January Jones, 25, began modeling at 18 but soon strutted her stuff in Bandits and Full Frontal.

In like a lion, out like a lamb: She's a lesbian porn star in the comedy Anger Management but cleans up her act as a virgin in August's American Wedding.

The cruelest month: Parents Marv, 47, a fitness director, and Karen, 45, a sporting-goods store manager, named her after a character in Jacqueline Susann's Once Is Not Enough. She recently read the 1973 novel, in which her namesake experiences a drug trip, a beach orgy and an alien abduction. "It was horrible!" says Jones.

April fools: As a teen in Sioux Falls, S.Dak., Jones "did the sneak-out routine," says Marv. "One night she went out the basement window. Our dog was barking, which got her caught. Next time, she tried taking the dog with her."

Spring fever: Anger costar and executive producer Adam Sandler kept suggesting unscripted makeout sessions with Jones's onscreen lover Krista Allen. "We just went for it," says Jones. Adds director Peter Segal: "She seemed shy at first. When the cameras rolled, she turned on a new personality."

June bride? Not Jones, whose long-term relationship with Ashton Kutcher ended more than a year ago. She says romance "is too hard in this town."

New Year's resolution: "Great white [sharks] scare me, but I'd love to go down in a cage with them," says Jones, who lives in a two-bedroom L.A. pad. "Anything that really scares me, I have to get it out of my system. Like acting."