Mike Tindall has revealed that he and wife Zara will be keeping the sex of the royal baby a surprise.

The couple, who are parents to Mia, seven, and two-year-old Lena, are expecting their third child this year.

In an interview with The Times, the former rugby star said: "It was always an interesting question whether we'd go for a third and I think both of us wanted a boy, so hopefully we'll get one.