The Duke and Duchess of Cambridge are visiting north Wales, on a trip focused on young people and mental wellbeing.
Following a morning of engagements, the couple met school children at an outdoor activity centre in Snowdonia.
Their Royal Highnesses also took part in a spot of competitive abseiling.
As the pair egged each other on, William took the lead whilst Kate lowered her husband down the 12 metre wall from below.
Their instructor asked the Duchess "Is the insurance good?" To which she replied "I'm quite enjoying this actually, for once I'm in control".
The royal couples friendly rivalry was evident.
National Chairman of Mountain Rescue England and Wales, Mike France, said: "Catherine said, 'not that we are competitive, but if he does that I'm going to have to do that', and she did."
All the children at the centre have taken part in anti-stigma and discrimination training, to be able to recognise when others might be suffering from mental health problems.