Mary-Kate Olsen is reportedly pregnant.

The 22-year-old star - who shot to fame alongside twin sister Ashley in hit US TV show 'Full House' aged nine months - has sparked rumours she is expecting her first child after her weight shot up to 102lbs, according to National Enquirer magazine.

A source said: "Mary-Kate has been looking a lot rounder recently. It is good she has put on weight, because she previously suffered from anorexia, but a lot of people think she could actually be attempting to hide her pregnancy."

"She is really happy with Nate and is very excited they will soon be starting their family together."

source