The cast spent three days in the oatmeal pit. Eugenio Derbez (Alejandro) had a particularly bad time when his character gets submerged. “It got in my ears, my nose, every crevice,” Derbez laughs. “But the smell? We smelled like breakfast for a week.” The behind-the-scenes story of Dora and the Lost City of Gold is one of risk. It could have been a cheap nostalgia cash-grab. Instead, director James Bobin and his team made a conscious choice: respect the source material, but never mock it. They built real sets, embraced practical effects, and cast a lead who understood that Dora’s greatest superpower isn’t her map or her backpack—it’s her relentless, joyful confidence.
When the first trailer for Dora and the Lost City of Gold dropped, the internet did a double-take. This wasn’t the gentle, fourth-wall-breaking cartoon from Nickelodeon. This was a live-action jungle romp with quicksand, ancient booby traps, and a surprisingly sharp wit. How do you take a seven-year-old cartoon icon and turn her into a feature film for teenagers and nostalgic adults? We went behind the scenes to find out. Casting the Ultimate Optimist The biggest challenge was finding Dora. She had to be relentlessly positive, fiercely intelligent, and completely sincere—without being annoying. Enter Isabela Moner (now known as Isabela Merced). dora and the lost city of gold behind the scenes
“We mixed two tons of rolled oats, water, and green food coloring in a tank,” reveals special effects coordinator J.D. Schwalm. “It has the exact viscosity of quicksand—slow to sink in, but impossible to move quickly.” The cast spent three days in the oatmeal pit
“It was chaos,” laughs co-star Jeffrey Wahlberg (Diego). “Isabela would be giving this heroic speech, and then a mechanical flower would sneeze powder in her mouth. We had to do, like, forty takes because we kept breaking character.” One of the biggest behind-the-scenes questions was: How do you handle Boots? In the cartoon, Boots is a talking monkey. In a live-action film, a talking monkey felt... risky. The solution? Boots is a real, trained monkey for most of the film (a cheeky capuchin named Baby), but he doesn’t talk. Instead, Dora interprets his chattering. “But the smell
Director James Bobin ( The Muppets , Alice Through the Looking Glass ) knew he needed an actress who could handle physical comedy, dramatic moments, and action. Merced trained for weeks in stunt choreography, learning to swing on vines and slide down muddy slopes. But Bobin says her secret weapon was her sincerity. “Isabela never winks at the camera. She plays Dora completely straight. That’s why the jokes land.” While the film takes place in the lush, dangerous Peruvian Amazon, the majority was shot in Cairns, Australia, and on soundstages in Los Angeles. Production designer Mark Tildesley faced a unique puzzle: how to make a fake jungle look real enough for a high-stakes adventure, but vibrant enough to feel like Dora’s world.
And that’s the real treasure.
To create Swiper’s signature blue-and-black mask, the effects team designed a practical suit covered in subtle blue LEDs. Del Toro would creep through the jungle set, completely silent, while the actors had to react in fear. “He’s this Oscar-winning actor, and he’s full-on sneaking behind a fake bush in a spandex suit, whispering ‘Swiper, no swiping!’” recalls Merced. “It was surreal and amazing.” In one of the film’s most memorable sequences, Dora teaches her city-slicker cousin Diego how to escape quicksand. On screen, it looks terrifying. Behind the scenes? It was a giant pool of oatmeal.