1. Hugh Hefner has a bachelor's degree in psychology from the University of Illinois
The renowned publisher also minored in creative writing and art, graduating in 1949.
2. He reportedly had an IQ of 152 when he was in high school
This effectively made him somewhat of a child prodigy.
3. Hefner served in the army during WWII
He enlisted as an infantry clerk in 1944, and spent his downtime drawing cartoons for the Army newspaper...
4. In fact, he had quite a knack for cartoons. During his high school career, Hefner created a comic-book autobiography which he called School Daze
And in university, his cartoons were published in his college newspaper, The Daily Illini.
5. Hugh Hefner met his first wife in college
He married Mildred Williams in 1949, eventually divorcing in 1959. They had two children, Christie Hefner and David Hefner. He subsequently married twice - to Kimberly Conrad in 1989 and Crystal Harris in 2012
6. He used to work for Esquire as a copywriter in 1951
But quit after he was denied a $5 raise. Hefner quickly went on to found the little-known Playboy magazine. Who knows what happened to that magazine?
7. Playboy was created in his South Side Chicago apartment
As he told the Chicago Tribune in 1994: "the entire staff was my card table, my typewriter and me."
8. Hefner was arrested in 1963 for "publishing and distributing an obscene magazine"
The case was eventually deemed a mistrial, after the jury could not reach a conclusive decision.
9. He was an avid Pepsi drinker
According to the New York Times, in the early days of Playboy magazine, Hefner burned the midnight oil with the help of Pepsi and amphetamines. Later in life, he switched to caffeine-free diet Pepsi.
10. The Lower Keys marsh rabbit was named after Hugh Hefner in 1984
The rabbit is also known as the Sylvilagus palustris hefneri.
11. His oldest daughter, Christie Hefner, ran Playboy for 20 years
In 1988, Hefner announced that his first-born child, Christie would be taking over as CEO and Chairman of Playboy Enterprises Inc. She held the role until 2008.
12. Hefner's not only related to former Secretary of State John Kerry, but also President George W. Bush
Hefner is allegedly the ninth cousin, once-removed from Kerry and the ninth cousin, twice-removed from Bush.
13. He holds two Guinness World Records
One is for having the longest career as an editor-in-chief of the same magazine, and the second, bizarrely, is for having the largest collection of personal scrapbooks.
14. Contrary to popular belief, Hugh Hefner has absolutely no idea how many women he's slept with
In an interview with Esquire in 2013 he said: "how could I possibly know? Over a thousand, I'm sure."
15. Hugh Hefner will allegedly be put to rest alongside Marilyn Monroe
This holds symbolic significance, as Monroe was the first covergirl to appear on Playboy magazine.