, Millie Mackintosh
, Cara Delevingne
, One Direction
have all shared fun snaps of themselves sporting onesies. Click on the photo for the full gallery for celebrities in onesies
While onesies are not the most flattering fashion items, they've gained huge popularity in the showbiz world in the past couple of years, with celebrities often turning up to photoshoots or chilling out at home in the all-in-one garment.