They arrested the man on Saturday evening at an address in Northamptonshire.
A statement reveal:
'He was arrested on suspicion
of a Computer Misuse Act offence and is being taken into custody at south London police station. Enquiries continue.'
The arrest follows reports that 3,000 images were stolen from the Duchess of Cambridge's sister. They are said to include pictures of Kate along with her children, Prince George and Princess
The Daily Mail and The Sun have each claimed they had been contacted by someone looking to sell the stolen images.