Prince William inherited the title of Duchy of Cornwall, which is his main source of income.
The Duchy of Cornwall has assets worth £1bn and gives Prince William an income of around £23m per year.
Prince William's net worth is around £32m and is expected to increase yearly due to the Duchy of Cornwall's income.
Kate wears Princess Diana's engagement ring, which has a 12-carat oval Ceylon sapphire and 14 solitaire diamonds.
The Duchy of Cornwall estate included The Oval cricket ground and Dartmoor Prison.