Kate Middleton and Prince William: October 2015
The pair, who welcomed their second child Charlotte at the beginning of May, were spotted laughing and clapping as they supported Prince Harry, who gave a speech to the 82,000-strong crowd at the event.
'This evening marks the beginning of a celebration of rugby that I hope will inspire current players and new generation,' he said. 'There will be moments that will live with us for rest of our lives.'
'To all the players, we wish you well for the tournament. Your individual skill is to be celebrated and I can think of no other sport in which the success of the team is shouldered so equally by everyone.'
The appearance was one of Kate's first appearances since her maternity leave ended. Doesn't being a mum-of-two suit her?
Click through to see how Kate has changed over the years...
- Best potties: Which is the best potty for toilet training?
- Top Christmas toys 2017
- Hidden sugar in kids foods: What's in your child's favourites?
- Top kids' toys for 2017
- Free knitting patterns
- The royals as babies
- Royal baby traditions
- Celebrities with twins
- Creative play: Christmas gift ideas that encourage imaginative play