American model/television personality Crystal Harris has revealed that she does not notice the 60-year age difference between her and Playboy founder husband Hugh Hefner.

Hefner and Crystal were engaged and were due to be married in the summer of 2011 but she called it off, just five days before the ceremony, after having what Hefner described as a "change of heart". However, the two tied the knot on 31 December last year, and she says their relationship is currently the best it has ever been.

"Hef's very romantic, very cozy," the 27-year-old told Access Hollywood. "We really care about each other and get along great. I don't notice the age difference. Hef's a lot of fun."

Harris and Hefner met on Halloween 2008 and started dating in January the following year. The Call the Cops singer revealed how the two reunited for the second time.

"I missed him and he missed me," she said. "We're happier than ever, things are better now than they were then. Hef loved me more than I've ever felt in my life."

Both of them spoke ill of the other following the end of their first engagement. Harris said on the Howard Stern show that sex with Hefner lasted "like two seconds".

"[It lasted] like, two seconds," she said then, "Then I was just over it. I was like, 'Ahh.' I was over it. I just, like, walked away. I'm not turned on by Hef. Sorry."

Meanwhile, Hefner said in a different interview that being single is his "natural state" and "I don't know what I was thinking about" in getting engaged to Harris.

Hefner has been married twice before - to Mildred Williams from 1949 to 1959 and Kimberley Conrad from 1989 to 2010 - and has four children.