Cast member Jon Hamm (C) poses with co-stars Christina Hendricks (R) and Elisabeth Moss at the premiere for the fourth season of the television series Mad Men at the Mann 6 theatre in Hollywood, California July 20, 2010. The fourth season debuts on July 25. REUTERS/Mario Anzuoni (UNITED STATES - Tags: ENTERTAINMENT)

As a huge fan of Mad Men (who isn't?) I was excited to see Don Draper, Peggy Olson, Joan Holloway, and the rest of the gang hit the red carpet at the fourth season premiere. Despite not being dressed in their usual 1950s garb, the cast of the hit show donned their best for the occasion. Our favourite sex-bomb Christina Hendricks lead the way in a black lace minidress which hugged her curves in all the right places. Jon Hamm (a.k.a. Don Draper) looked every inch the leading man in black suit and brown tie, while Elizabeth Moss added a splash of colour in a one-shouldered green structured dress. But where was Betty Draper, otherwise known as January Jones?