EXCLUSIVE: 'TMNT 2' Star Megan Fox Urges Parents to Get Kids Off Social Media: It's Toxic!

'Arrow' star Stephen Amell, who debuts as Casey Jones, talked to ET about a very special visitor he had on the film set.

Megan Fox is not a fan of social media and she wishes parents kept a closer eye on their children that use it.

"I think it's really toxic for our youth culture," Fox told ET on the set of Teenage Mutant Ninja Turtles 2. "There is a hierarchy in schools of who's the cool kid based on who has the most followers and who has the most likes. It's a really terrible message to wake up every day and have your kids going, 'Who liked my photo?' and 'Who's following me?'"

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Fox says that she's seen firsthand the kind of destruction that can occur when kids put too much emphasis on their Internet followers.

"When I was on Twitter for five days, I would have 12- and 13-year-old kids going, 'If you don't follow me back, I am going to kill myself.' I was like this is [expletive] awful," the 29-year-old actress said. "Parents should pay attention to that and have your kids off of it. You're not ready for that [expletive] when you're a teenager. You need to be an adult before you can start messing around with that. It's irresponsible and it's dangerous."

Fox doesn't have to worry about keeping her two sons Noah and Bodhi, whom she co-parents with ex Brian Austin Green, off social media as they're still toddlers. And, they're probably too young to see their mom reprise her role as April O'Neil in the upcoming Teenage Mutant Ninja Turtles sequel, Out of the Shadows.

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April and the turtles are headed back to the big screen next year after the first film made $493 million at the worldwide box office. This time, the turtles are joined by new characters, which include the hockey mask-wearing vigilante Casey Jones (Stephen Amell) and scientist Baxter Stockman (Tyler Perry).

Amell, who many may know as the Green Arrow on The CW's superhero drama Arrow, had an adorable visitor on set while he filmed the TMNT sequel in the Big Apple: his 2-year-old daughter Maverick.

"She came to set a couple of times and when she would see me on the monitor, she would go, 'Dada! Movie! Casey Jones!'" the 34-year-old actor told ET. "I'm really hoping that it's something that she can enjoy but I have a feeling we might lose her to Finding Dory next summer."

"It's nice to be back here in New York, tackling the city," said Will Arnett, who returns as Vernon Fenwick.

Teenage Mutant Ninja Turtles: Out of the Shadows opens June 3, 2016.