'What is Tik Tok?' Reese Witherspoon's hilarious dance lesson from teenage son

Photo: Reese Witherspoon/Instagram
Photo: Reese Witherspoon/Instagram 

While she recently opened up about the challenges of having babies in her early 20s, Reese Witherspoon is clearly nailing the whole "parenting teenagers" thing. The 43-year-old shared a clip of her son, Deacon, explaining popular app TikTok - and it's hilarious and charming all at once.

"For all the mums out there, what is TikTok?" Witherspoon asks Deacon, 15, whom she shares with former husband Ryan Phillipe.

"Oh god," he says. ( Evidently, even if your mum is Reese Witherspoon, she's still totally embarrassing.)

"It's like a short form video platform for kids. Social media," Deacon says.

"Do people pick a song they like and they lip sync the words?" Withersooon asks.

"Yes," says the ever-patient Deacon. 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

A post shared by Reese Witherspoon (@reesewitherspoon) on

Witherspoon then busts out her inner robot and some kind of "rolly rolly rolly " move.

"This is so embarrassing," her son laughs.

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Once she's figured out her content, Witherspoon ponders what to call her channel.

"Reese Tik?" she asks. "Reese Tok?"

But Deacon's not sold.

"Reese to the Tik to the Tok?" she says.

 "I think I nailed it..." the Legally Blonde star captions the video.

But while Deacon might not have been taken with his mum's efforts, Witherspoon's famous friends couldn't get enough.

"This is everything!"  wrote mum-of-four Victoria Beckham

"You did nail it," said Cruel Intentions co-star Selma Blair. "This is my recreational life. Every day. Everything is a meme over here."

"I've watched this nine times already," wrote comedian Mandy Kaling. "You are so funny. I can't believe how polite your son is."

"Goof ball," added Elle Mcpherson.

But TikTok isn't the only app she's mastered. 

"How to talk to teenagers on Snapchat," she captioned this image. 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

A post shared by Reese Witherspoon (@reesewitherspoon) on