The Side Hustle That Stole the Show: Celebrities Who Accidentally Built Empires Outside Their Lane
Hollywood has a type. You break in through one door — acting, music, sports — and that becomes your identity. Your brand. The thing the press puts in the headline before your name. But every so often, someone quietly builds something on the side that doesn't just complement their main career. It eclipses it.
These aren't your standard celebrity brand deals or fragrance lines slapped together by a marketing team. These are genuine passion plays — projects that started because someone actually cared, and ended up reshaping what we think those people are even about. Let's run through some of the most striking examples.
Rihanna: The Mogul Who Used to Be a Pop Star
Okay, let's just get this one out of the way immediately because it's the most dramatic example of the phenomenon in modern pop culture history.
Rihanna released her last studio album in 2016. Since then, she has launched Fenty Beauty, which reportedly generated over $550 million in revenue in its first full year of operation and fundamentally changed the conversation around inclusivity in cosmetics. She followed that with Savage X Fenty, a lingerie brand that turned the Victoria's Secret model of fashion shows on its head and attracted serious investment capital. Her net worth, largely built on these ventures, has landed her on Forbes' billionaire list.
The music career that made her a household name? It's now the side hustle. And nobody seems particularly upset about that — least of all Rihanna.
What's fascinating here isn't just the business success. It's that audiences believe in Fenty in a way they might not believe in a celebrity perfume line, because it's visibly rooted in something Rihanna actually cared about. The 40-shade foundation launch wasn't a PR stunt — it solved a real problem she'd talked about publicly for years. Authenticity, it turns out, is a heck of a business model.
Jared Leto: The Oscar Winner With a Rock Band
Here's one that flips the usual script. Most people discovered Jared Leto through his film work — Requiem for a Dream, Dallas Buyers Club (which won him an Oscar), Fight Club. But for a substantial and deeply dedicated segment of the population, Jared Leto is first and foremost the frontman of Thirty Seconds to Mars.
The band has sold over 10 million albums worldwide, headlined major festival stages, and built a fan community called the Echelon that operates with the kind of devotion typically reserved for religious organizations. Their documentary, Artifact, captured a very real legal battle with their label that resonated with fans on a personal level and reinforced the band's identity as artists fighting for creative control.
Ask a Thirty Seconds to Mars fan about Dallas Buyers Club and you might get a polite nod. Ask an average moviegoer about the band and you might get a blank stare. Two distinct worlds, one celebrity, and depending on who you ask, the side project is the main event.
Steve Martin: Comedian Turned Serious Banjo Virtuoso
Steve Martin spent decades as one of the most recognizable comedic actors in America. The Jerk. Roxanne. L.A. Story. Father of the Bride. The man is a legitimate comedy legend. But sometime in the late 2000s, something shifted.
Martin had always played banjo — it was a known quirk, a fun fact. Then he released The Crow: New Songs for the Five-String Banjo in 2009, a genuinely accomplished bluegrass album that won a Grammy for Best Bluegrass Album. He followed it with more recordings, a touring partnership with Steve Earle and Edie Brickell, and a full-blown second career in American roots music that critics took completely seriously.
It didn't overtake his acting profile in mainstream name recognition, but within the world of bluegrass and Americana, Steve Martin is a credible, respected figure on his own musical terms. That's a remarkable pivot — and it happened because it was real.
Zooey Deschanel and She & Him
Before New Girl made her a TV fixture and the face of a very specific early-2010s aesthetic, Zooey Deschanel had already launched She & Him with musician M. Ward — a gentle, vintage-inflected folk-pop project that developed its own dedicated following entirely separate from her acting career.
The project never chased mainstream radio play and didn't need to. It found its audience organically, releasing a string of albums that critics consistently praised for their warmth and sincerity. Deschanel's acting work has always been the bigger commercial machine, but She & Him represents something arguably more culturally specific: a project that people feel like they discovered, which is exactly the kind of connection that creates lasting loyalty.
Donald Glover: The Exception That Proves Every Rule
No list like this would be complete without acknowledging Donald Glover, who has made an entire career out of refusing to stay in one lane. Writer, actor, director, and musician (as Childish Gambino) — every single one of those careers has reached the top tier of its respective field.
"This Is America" wasn't a side hustle experiment. It was one of the most discussed pieces of American popular art in 2018. Atlanta isn't a vanity project — it's considered one of the greatest television series of the past decade. The man doesn't have a main career with side projects. He has multiple simultaneous main careers, and each one feeds the others.
Glover is the extreme version of what all these stories are pointing toward: when a creative person follows genuine passion instead of brand strategy, audiences can feel the difference. And they respond to it in ways that no marketing budget can manufacture.
So What's the Takeaway?
The thread connecting all of these stories isn't luck or timing, though both play a role. It's that audiences in 2024 are remarkably good at detecting when a celebrity project is a cash grab versus when it's something a person actually gives a damn about. The former might get attention. The latter builds devotion.
In an entertainment landscape increasingly saturated with content, that distinction matters more than ever. The passion project that starts as a footnote has a funny way of becoming the headline — and at Sengit, we're absolutely here for it.