TEAM LINDSAY ARNOLD
It’s a family affair: Pro Lindsay jumped at the chance to coach younger sister Rylee and her partner, Black-ish star Miles Brown. “I feel like I’ve actually been teaching her for years,” the Mirrorball champ, 24, says of her mini-me, 13. “I don’t care if she is better than me!” A love of dance was passed down to Brown, too. “My grandma watches the show all the time,” says the actor, 13. “She introduced me to it back when I was, like, 2!”
TEAM JENNA JOHNSON
“It’s really fun to be around this young energy,” the So You Think You Can Dance alum, 24, raves of her trainees Tripp Johnston, 9, and niece Hailey Bills, 12. “It’s inspiring! They don’t take it too seriously, whereas with adults,…