Williams, 30, is competing in the British show along with professional dancer Brendan Cole, and wants the programme's dress designer to make a gown for her big day.
She said to UK newspaper The Sun: 'I love the clothes on Strictly. The company who make them do amazing dresses. I told them: 'One day you'll have to make my wedding dress.'
'And I'm not even engaged. I would love to take inspiration from my Strictly outfits to make it. I'd have a dress which would really reflect me and my personality.'