Children are ruthless, vicious (and viscous) beings. They poop and cry and tantrum all over the place. Then, in the blink of an eye, they turn right around and give you—the parent—the biggest, cutest smile imaginable while doing a cheeky little giggle, and you're suckered into knowing you'll do anything for that child for the rest of their natural life. There's some evolutionary biology programmed into that response, this wild idea that the human species should both 1) perpetuate itself and 2) love its family members, and honestly? It's pretty unfair. Children have the upper hand over their parents, despite not contributing to rent or grocery bills or cleaning. Unconditional love leads you to maddening places, it turns out.

That idea morphs into something more public when you're a celebrity. See, oftentimes, writers and actors and performers do big-budget, massive projects just to appease their children. And thank God for the kids, because without their pestering, we wouldn't have such iconic characters as "Detective Pikachu" and… "peckish Larry David."

Will Smith SHARK TALE CRACKED.COM Smith took the role of Oscar when his kids were toddlers, and said it's only natural for celebs to congeal around these types of movies: Okay, yeah, somebody's kid just turned 7, that's why they are doing this.

Source: Today

Julianne Moore THE HUNGER GAMES CRACKED.COM Her kids kept adorably pestering her (Oh, Mommy, there are these books that I really love!') until she finally read the books and fell in love with the dystopian universe.

Viggo Mortensen LOTR CRACKED.COM As Peter Jackson scrambled to replace a tragically youthful Stuart Townsend, Viggo's son pushed him to take the role. As thanks, Jackson gave the kid several cool little cameos.

Ryan Reynolds DETECTIVE PIKACHU CRACKED.COM It'll be a few years before his 5-year-old can really appreciate Van Wilder, SO he said he was excited to do a film that my kids would love.

Source: CinemaBlend

Djimon Hounsou GUARDIANS OF THE GALAXY CRACKED.COM He jumped at the role of Korath The Pursuer after his son told him he wished he had lighter skin, SO that he could be Spider-Man He wanted to prove that anyone can be super.

Idris Elba THE JUNGLE BOOK CRACKED.COM He took the role of Shere Khan SO that his kids could see a classic with their dad's voice.

Source: YouTube

Anthony Mackie THE WINTER SOLDIER CRACKED.COM As the first African American hero in the MCU, he says the most exciting thing for me is to come out on Halloween and see all the little Black kids dressed up like The Falcon.

Danny DeVito IT'S ALWAYS SUNNY IN PHILADELPHIA CRACKED.COM One of the best casting decisions of all time began as an uneasy compromise: FX wanted people to actually watch the show, but the gang didn't want a token celebrity cameo. DeVito just wanted in because his kids were fans.

Larry David HANNAH MONTANA CRACKED.COM David made a cameo with his daughters, because they were huge fans of the show. In the scene, he endures the indignity of watching Hannah Montana get a seat at a restaurant because she's more famous than he is.

Source: YouTube

Dennis Hopper SUPER MARIO BROS. CRACKED.COM When his kid grew up and asked why Dennis had taken such a dogsh*t role, he told him Well Henry, I did that SO you could have shoes. The li'l scamp replied I don't need shoes that badly.

Tommy Lee Jones BATMAN FOREVER CRACKED.COM Jones was pretty miserable throughout his stint as Two Face, once even telling Jim Carrey I hate you. I cannot sanction your buffoonery. He only suffered through it because his son loved the franchise and schooled him on his character's backstory.

David Bowie SPONGEBOB SQUAREPANTS Bowie said he hit the Holy Grail of animation gigs when he got the role of Lord Royal Highness and impressed the hell out of his 6-year-old daughter.

Source: Today

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