kim kardashianKim Kardashian is reportedly working hard to slim down her infamous big bum.

According to the New York Post, Kim is working out ahead of starring opposite Carmen Electra in forthcoming film Disaster Movie and has asked her American Footballer boyfriend Reggie Bush to help out.

A source told the newspaper that the New Orleans Saints’ star “has been pushing her to work out hard” and the couple have been running through the sand dunes at Manhattan Beach, California together: “She doesn’t want to lose her curvy shape, just get slightly thinner overall.”