Let's be honest. Sid the Sloth was never exactly the "casanova" of the Cenozoic era. For four movies, we watched him get dumped, abandoned by his family, and accidentally almost start an apocalypse—all while looking for love in the absolute worst places. But then Ice Age: Collision Course happened. Finally, Blue Sky Studios gave the guy a win. Enter Brooke.
If you’re looking for Sid's girlfriend in Ice Age Collision Course, you’re looking for Brooke. She isn't just another sloth; she’s a ground sloth who lives in a literal fountain of youth called Geotopia. Voiced by the powerhouse Jessie J, Brooke is the high-energy, eternally young, and surprisingly patient partner Sid somehow deserved after years of being the herd's punching bag.
The Geotopia Connection: Where Sid Met Brooke
Most people forget how weird the plot of the fifth movie actually is. While a giant asteroid is screaming toward Earth, Sid is busy trying to propose to a sloth named Francine (voiced by Melissa Rauch). It goes terribly. She dumps him in the first five minutes because he’s, well, Sid.
But things take a turn when the herd discovers Geotopia. This is a community built inside a fallen asteroid made of magnetic crystals. Because of these crystals, the residents don’t age. This is where Brooke comes in. Unlike everyone else who finds Sid repulsive or annoying, Brooke sees him and it's basically love at first sight.
It’s a weirdly wholesome moment in a franchise that usually focuses on slapstick. Brooke is vibrant, her fur is a distinct shade of peach/orange, and she wears these long, flowing floral accessories that make her stand out from any other sloth we've seen. She isn't just a background character. She becomes the catalyst for Sid actually growing up a little bit.
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Why Brooke is Different From Every Other Sloth
Usually, sloths in this universe are portrayed as slow, dim-witted, or gross. Sid is the poster child for this. But Brooke breaks the mold. She’s articulate. She’s kind. She’s also a bit "out there," which is why she fits so well with Sid.
In the film, she explains that she’s actually hundreds of years old. The crystals in Geotopia kept her looking like she was in her twenties. When the crystals are eventually shattered to help stop the asteroid, she ages instantly back to her natural state. But here is the kicker: she still loves Sid, and Sid still loves her.
It was a rare moment of genuine heart in Collision Course. It proved that Sid wasn't just looking for a "pretty" girlfriend; he was looking for someone who actually "got" him.
The Impact of Jessie J's Performance
Choosing Jessie J for this role was a specific move by the producers. They needed someone who could match John Leguizamo’s frenetic energy. Leguizamo has voiced Sid since 2002, and his lisping, fast-talking delivery is iconic. If you put a "normal" sounding voice actor next to him, it would feel off-balance.
Jessie J brought a musicality to the role. Literally. She performs "My Superstar" in the movie, which is basically a tribute to Sid. It’s a catchy, high-energy pop track that feels a bit surreal given the "end of the world" stakes of the movie, but it works because the Ice Age movies have always been about the absurdity of their characters.
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Is Brooke still Sid’s girlfriend?
This is a point of contention for fans who followed the franchise into the Disney+ era. In the spin-off The Ice Age Adventures of Buck Wild, Sid's girlfriend is notably absent. This led to a lot of speculation online. Did they break up? Did the writers just forget her?
The reality is likely more boring: The Ice Age Adventures of Buck Wild focused on the possum brothers, Crash and Eddie, and was produced with a different animation budget and creative team. However, in the established lore of the main theatrical films, Brooke and Sid are very much a couple. At the end of Collision Course, Brooke actually leaves Geotopia to stay with Sid and the herd. She chose a mortal life with a clumsy sloth over eternal youth in a crystal cave. That’s commitment.
Breaking Down the "Geotopian" Sloth Biology
One of the more interesting details for the lore nerds is how Brooke’s appearance changes. When the "crystals of life" are destroyed, she doesn't turn into a skeleton. She just turns into an older sloth.
- Pre-Crystal Destruction: Bright eyes, sleek fur, high energy.
- Post-Crystal Destruction: Greying fur, slightly more wrinkled, but still retains her personality.
This was a bold move for a kids' movie. It touched on the idea that looks change, but the connection between people (or sloths) shouldn't. It gave Sid a level of emotional maturity we hadn't seen since the first movie when he was looking after the human baby, Roshan.
Why Users Keep Searching for Sid's Girlfriend
It’s mostly because the Ice Age series has such a long tail on streaming services like Disney+. New generations of kids are watching these movies for the first time, and Sid is always the favorite. When he finally gets a win, people want to know who the character is and if she shows up again.
Also, the character design for Brooke was a huge departure. She’s much more "stylized" than the other animals. Her hair is long and almost human-like, and her jewelry made from crystals and flowers gave her a "hippie" vibe that resonated with a different audience than the typical slapstick fans.
Expert Insight: The Evolution of Sid’s Character Arc
If you look at the trajectory of the Ice Age films, Sid’s search for a partner was a running gag that eventually turned into a legitimate character need.
In the first film, he’s abandoned. In The Meltdown, he tries to find respect among a tribe of "mini-sloths" who end up trying to sacrifice him. In Dawn of the Dinosaurs, he tries to "adopt" three T-Rex eggs because he’s desperate for a family of his own. By the time we get to Collision Course, his desire for a girlfriend isn't just a joke anymore—it's the completion of his family unit. Manny has Ellie and Peaches. Diego has Shira (introduced in Continental Drift). Sid was the only one left.
Brooke wasn't just a plot point. She was the final piece of the "Herd" puzzle.
Technical Animation Details You Might Have Missed
The animation of Brooke’s fur in Collision Course used a revised grooming tool at Blue Sky Studios. If you look closely during her musical number, the way the light hits the crystalline structures in her hair was a significant technical jump from the previous films. The "shimmer" effect was meant to signify her "frozen in time" status.
When she ages at the end, the animators didn't just swap the model. They used a transition effect that dulled the saturation of her fur. It’s a subtle bit of visual storytelling that shows she’s lost her "magic" but kept her spirit.
Final Summary of the Facts
If you're settling a bet or just curious, here's the bottom line:
- Name: Brooke.
- Movie: Ice Age: Collision Course (2016).
- Voice Actor: Jessie J.
- Species: Ground Sloth (Geotopian variant).
- Key Song: "My Superstar."
- Status: Last seen living with the Herd at the end of the fifth film.
Brooke remains one of the most popular late-franchise additions because she treated Sid with respect from the jump. She didn't need him to change; she liked the "messy" version of him.
To get the full experience of their relationship, you really have to watch the "proposal" scene at the end of the movie. It’s a callback to all of Sid’s failures, but this time, he finally sticks the landing. If you're rewatching the series, pay attention to the background characters in the Geotopia scenes—there are several other "eternal" sloths, but none have the distinct design or character depth that Brooke brings to the table.
Next Steps for Ice Age Fans
If you want to see more of Brooke, you should check out the "Scrat: Spaced Out" shorts, as they often feature cameos or references to the Geotopian environment. You can also find the official "My Superstar" music video on YouTube, which features extended animation of Brooke and Sid's dance sequences that didn't make the final theatrical cut. For those curious about the future of the series, keep an eye on Disney+ announcements, as there have been rumors of a sixth mainline film that would theoretically bring the entire Herd—including Brooke—back together for a proper theatrical outing.