Michelle Obama is to be the first presidential wife to appear on a reality TV series.
The First Lady will appear on Iron Chef America, which features Nigella Lawson as a judge.
The episode, which pits celebrity chefs against each other, has been filmed at the White House.
Mrs Obama agreed to take part in the show to promote her healthy living campaign.
White House executive chef Cristeta Comerford will also take part.
Lawson, actress Jane Seymour and US Olympic swimmer Natalie Coughlin are the judges of the ‘cook-off’.
