Paris Hilton is successful many times over. The reality TV star turned entrepreneur is the founder and CEO of 11:11 Media, a global entertainment company she aims to become “the next Disney” that combines her passions in music, beauty, fashion and philanthropy.

But people haven’t always believed in her business savvy.

“For a long time, I felt like people had an idea of who I was that didn’t reflect the real me,” Hilton told CNBC Make It over email following an appearance at the American Express Leadership Academy. “Early in my career, I leaned into the character I created on ‘The Simple Life,’ but behind the scenes, I was laser-focused on building my brand.”

Now, the multi-hyphenate and CNBC Changemaker says she’s been able to “take back my narrative” through career achievements like launching her company in 2021 and using her platform to advocate for kids in what’s known as the “troubled teen industry.”

“I’ve learned that the best way to overcome being underestimated is to let your work speak for itself and to show up authentically,” Hilton said.

The businesswoman said authenticity is a key trait in the people she decides to work with, in addition to being passionate and creative. “And kindness is non-negotiable for me,” Hilton added. “It shows people’s true character, and I want my brand and everyone who represents it to lead with kindness.”

Authenticity also guides her philanthropy. “Every cause I champion comes from my lived experience, and I would never fight for something I didn’t believe in wholeheartedly,” she said.

In recent years, Hilton has used her spotlight to advocate for children harmed by America’s child welfare, juvenile justice, education and health-care systems. Last year, she appeared before Congress and helped to pass the bipartisan Stop Institutional Child Abuse Act.

Hilton encouraged other young entrepreneurs to meaningfully integrate philanthropy into their work. “Impact shouldn’t be an afterthought; it should be part of your mission from the very beginning,” Hilton said, adding that the second hire she made for her company was 11:11 Media’s head of impact Rebecca Grone.

“I’d also encourage young entrepreneurs to think creatively about impact and truly listen to the communities they want to serve,” Hilton said. “When you have a platform or influence, you can inspire your audience to take action alongside you, and that’s a powerful way to create lasting change.”

Want to level up your AI skills? Sign up for Smarter by CNBC Make It’s new online course, How To Use AI To Communicate Better At Work. Get specific prompts to optimize emails, memos and presentations for tone, context and audience.

Plus, sign up for CNBC Make It’s newsletter to get tips and tricks for success at work, with money and in life, and request to join our exclusive community on LinkedIn to connect with experts and peers.