Over the years, Jonathan Cheban has appeared in over 20 episodes of E!'s Keeping Up With the Kardashians. Fans of the series have gotten to know him as Kim Kardashian's best friend, the guy Kourtney Kardashian famously slapped, and the one the girls are always suspicious of whenever there's a press leak. But how much do we really know about the 43-year-old reality star and former PR manager?

Jonathan was grew up in Fort Lee, NJ and graduated from college in 1995. He began working for publicist Peggy Siegal after graduation. His first big break was when he worked Sean Combs' 29th birthday party, an offer Peggy herself turned down. He eventually left his boss' firm and and formed his own, CommandPR. Keep reading to learn more about Jonathan!

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How does Jonathan know Kim Kardashian?

It is believed that Jonathan has known Kourtney's ex-boyfriend Scott Disick since they were children. (It's plausible considering Jonathan grew up in New Jersey and Scott is from Eastern Long Island.) The reality star has also revealed that he had many famous friends growing up.

"It's really weird because I do have a lot of friends who are famous but I always knew them way before," he said. "I mean, back in the day when Ozzy would play Madison Square Garden, I was sneaking Kelly and Jack into Suite 16. And I’ve been friends with Paris and Nicky [Hilton] since they were kids."

While it's unclear exactly how the two met — theories that they could've been introduced by Scott or the Hiltons, who were also longtime friends of Kim, are possible — NewYou reports the friends met when they were seated next to each other at a birthday party.

Who are Jonathan Cheban's parents?

Jonathan was born to his mother Galina Cheban, a real estate agent at Sotheby's, and his father, Mikhail Cheban, a diamond dealer. Jonathan's father passed away in 2011.

Does Jonathan Cheban have a wife?

Jonathan is not married at this time. In 2012, he briefly dated stylist Anat Popovsky but was single by the time he appeared on Millionaire Matchmaker a year later. While Kim K. was married to Kris Humphries — for a mere 72 days — the basketball star questioned Jonathan's sexuality on several episodes of the spinoff Kourtney and Kim Take New York.

How is Jonathan Cheban rich?

Jonathan began amassing his fortune when he first began working in the PR business for publicist Peggy Siegal. His PR companies have represented clients like Banana Republic, Playboy, Backstreet Boys, and more.

Did Jonathan Cheban go to college?

Yes — Jonathan Cheban graduated from Hofstra University with a communications degree.

How much is Jonathan Cheban worth?

According to Celebrity Net Worth, Jonathan is worth $5 million. Apart from his appearances on the many Kardashians spinoffs, Jonathan has launched his own clothing line, Kritik, and designed jewelry for RichRocks. His latest endeavor is his personal Instagram account, which he's transformed into a foodie's dream account. "Eating out 365 days of the year," his bio says.