Chrissy Teigen wants to get pregnant - so she has an ''excuse'' to put on weight.

The 29-year-old beauty - who is married to John Legend - had been waiting until her professional life was less hectic before starting a family, but as she is busier than ever, she now thinks she should ''just have one''.

She told Women's Health magazine: ''I'm waiting for things to slow down, but things don't seem to be slowing down, ever, so I think, 'Just have one and deal with it.'

''I'd love to have an excuse to be bigger. People will know as soon as I'm pregnant because I'll stop drinking.''

The 'Lip Sync Battle' star enjoys indulging with food and drink so would rather exercise more than force herself to diet.

She admitted: ''I've always had to watch myself. My family is not naturally thin and we put on weight quickly. I find low-carb works for me.

''I used to take pride in the fact I didn't have to work out, and then I hit that age where you have to. I want to drink champagne and have hearty dinners, so I would rather work out for an hour and be able to do what I want.''

Chrissy's full interview appears in the September Naked issue of Women's Health, on sale Thursday 30th July. Also available in digital edition on Apple Newsstand.