She is known for her unconventional choices and now US first lady Michelle Obama is setting another precedent by the first presidential wife to appear on a reality TV series.

The First Lady will make a guest appearance on the popular series Iron Chef America which features British cook Nigella Lawson as a judge, reported Daily Mail online. The episode of the popular series, which pits well-known chefs against each others, has been filmed at the White House and will be aired in the New Year.