Elena Bonvicini didn't set out to start a multimillion-dollar denim brand worn by the likes of Taylor Swift, Gigi Hadid and Kendall Jenner. Even charging her friends and classmates just $10 or $30 for a pair of jeans, Bonvicini turned a nice profit. Elena Bonvicini Founder, EB DenimAt college, Bonvicini worked diligently to expand EB Denim. This exposure also got EB Denim into high-end retailers like REVOLVE and Selfridges. By the time she was a junior, she says EB Denim was bringing in over $1 million in revenue and had a small handful of employees and interns.

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Persons: Elena Bonvicini didn't, Taylor Swift, Gigi Hadid, Kendall Jenner, Bonvicini, Elena Bonvicini, EB, Chiara Ferragni, Danielle Bernstein, Kylie Jenner of, —, seamstresses, couldn't, Kylie Jenner, Hailey Bieber, Bella Hadid Organizations: CNBC, Denim, EB, Melrose Trading, Flea, USC Locations: Southern California, Wisconsin, influencers, Kylie Jenner of Italy