With rumors circulating that Prince Harry and girlfriend Cressida Bonas will be planning a royal engagement soon, many are taking a look at the fashion style of the possible soon-to-be princess.

Compared to Princess Kate Middleton-- who's known by many for her classy, elegant styles -- Bonas's trends are much more casual and laid-back, with a bohemian and aristocrat flair, according to The Daily Beast. She's been spotted making unique fashion statements and channeling the 90's with patched overalls: a white tank top and retro white sneakers with neon green sunglasses, to a green blazer with a printed, long maxi, multi-colored dress and hot pink wedges topped with a scrunchy. The website noted that Bonas style is about her not being afraid to stand out without showing off, and that some of her ensembles would never been seen on Middleton.

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Glamour magazine has also taken notice of Bonas' style and complimented her ability to switch it up and look stunning in almost everything from a long, halter-top rainbow jumpsuit to a knee-length, long-sleeved, scoop-neck basic white dress. Bonas could get her style from her mother Lady Mary-Gaye Georgiana Lorna Curzon, who was a socialite in the sixties, according to E!

A source told US Weekly that Bonas and Prince Harry will be engaged very soon.

"He loves her-- they're so compatible," the insider said. "Cressie is very laid-back and he likes that. If all goes well, I'm 100 percent sure they'll be engaged next year."

Prince Harry's cousin, Princess Eugenie, is Bonas' best friend and set the two up. They went public with their relationship in June 2012.

Tags: Prince Harry