The Duchess of Cambridge delighted royal fans with her first ever selfie-style video to mark Children's Mental Health Week, and we couldn't help but notice that Kate may have given one of her hobbies away.

The mum-of-three appeared to have been in the middle of a jog in the grounds of her Norfolk home, Anmer Hall, when she whipped out her phone to record the special message to encourage parents and carers to look after their own mental wellbeing.