The former 'Made In Chelsea' star and the rapper recently celebrated their first wedding anniversary and she admits she has started thinking about having a family and her dream would be to have a son and a daughter.
Speaking in the new issue of OK! magazine, she said: ''I'd like two (children). I'd love a boy and a girl, that's a nice balance, but I've got two dogs already so they're our children at the moment!''
Millie has just launched her first fashion line, the Millie Mackintosh Collection, and she plans to put all her energy into making the clothing range a success until she has kids.
She added: ''At the moment I can see as far as until I have children, so maybe in the next five years I'll do a maternity range!''
The 25-year-old star insists she and Green - real name Stephen Manderson - are still getting used to married life and all the decisions you have to make as a couple.
Discussing their marriage after the first 12 months, she explained: ''Well you're still learning - we've just moved and done up our first house. But it's gone so quick, so now I'm like bring on the next one! I'm doing Christmas this year so there will be 12 people with both our families.''