Joey King talks about her 'A Family Affair' co-stars, Nicole Kidman and Zac Efron, contributing to her fitness routine.
Nicole Kidman left a lasting impression on her co-star, Joey King -- and her buns. The 24-year-old actress, who plays Kidman's daughter in Netflix's A Family Affair, spoke about her onscreen mom's impact on her fitness routine during an interview on Monday's episode of The Tonight Show Starring Jimmy Fallon.
"She taught me the most epic, awful butt workout I've ever learned in my life. It was, like, so intense," King said of 57-year-old Kidman. "I was like, 'I'm a youngster. I can hang. I'm young, and I'm agile.' I thought I could hang, but I couldn't hang."
As for the workout that did King in, she shared, "It was these donkey kicks and the rainbows and the fire hydrants and all these other [moves]. But you have to keep your leg in the air for, like, 12 years. It's so hard."
Even though filming wrapped on the comedy, King said that she still practices the workout.
"I do it still because it's the most effective workout, so I send her photos when I do it. I'm like, 'Call an ambulance, love you!'" King quipped.
King called the Oscar winner "just a sweet and silly, fun person," adding, "She's such a girl's girl."
The two starred alongside Zac Efron in the film. King plays Efron's assistant and Kidman portrays her mom, who falls for Efron, a much younger Hollywood actor.
"Her and Zac, they're both, like, so hot," she added of her co-stars. "They're so hot. They're the fittest people I've ever met. So I became a bit of a tubular gym rat on the set."
As for the High School Musical alum's contribution to King's fitness regimen, she noted, "He was also, again, so fit, and he helped teach me about my protein intake. He's very helpful with the wellness tips."
ET spoke with King in June at the premiere of A Family Affair about the lighthearted comedy.
"I hope [audiences] take away a big, ole smile on their face. This movie is so fun," she mused. "It's got a lot of heart to it, but mostly I want people to have so much fun. We're in our fun era."
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