It's Nigel Lythgoe!
Charlotte Dujardin is the niece of American Idol producer Nigel Lythgoe's ex-wife Bonnie.
According to TMZ, Nigel hasn’t spoken with Charlotte in nine years, but as someone who sponsored her in her earlier years of the sport, he’s still touched by her successes. He admitted he even cried as he watched her win gold for the second time yesterday.
Nigel tweeted throughout Charlotte’s turn in the competition and exclaimed “She did it she did it she did it #GOLD” after her win. While he and Bonnie have split, he still referred to Charlotte as his niece and implored followers to keep their fingers crossed for her to succeed.