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Strictly Come Dancing: Johnny Ball in rehearsal with new partner

5 October 2012 Last updated at 11:20 BST

A star from the US version of So You Think You Can Dance will be Johnny Ball's new partner in Strictly Come Dancing.

Iveta Lukosiute will replace Aliona Vilani who fractured her ankle in training.

Breakfast's Tim Muffett spoke to the pair during rehearsals.