Los Angeles: Actress January Jones, who welcomed son Xander last September, says she has shed her pregnancy weight by doing nothing but her maternal duties.

"I haven't been dieting or working out much. I've just been running around, nursing and just keeping busy. I think that is exercise enough," a website quoted the 34-year-old as saying.

Jones also insisted she is having a blast with her baby boy."He's wonderful. Every day he changes drastically he's getting really fun and giggly now, and I can play with him...He's taking shape, which is really amazing to watch. Since I had the baby, (I )won't be able to take off to the Middle East with the baby," she added.