The 85-year-old Playboy founder will marry the 24-year-old blonde beauty at the Playboy Mansion in Los Angeles on June 18 and Hugh - who has been married twice before - insists Crystal is the only woman for him.
He said: "I'm devoted to her. This is as happy a time in my life as I've ever had. I feel very fortunate."
For Hugh, having a happy home life is especially important as he admits he had a strict upbringing and sought comfort in movies when he was a child.
He told Total Film magazine: "I grew up in the 30s and 40s. 'Frankenstein', 'The Bride of Frankenstein', I loved them. 'King Kong' was my favourite. I didn't exactly come from a home full of hugs and kisses. It was a typical conservative, puritan home and I was quite a solitary child, a bit of a dreamer. Movies showed me another world and sparked a desire In Me."