Hugh Hefner and Crystal Harris send out invites to wedding

The wedding invitations of Playboy founder Hugh Hefner and blonde Crystal Harris on June 18 are in the process of being delivered to the guests.

The wedding ceremony will be held at the Playboy Mansion in Los Angeles, and "Friends and family are already receiving our wedding invitation," Harris recently tweeted.

The elegantly simple wedding card is white in color, studded with fuchsia and turquoise Swarovski crystals and reads: "Crystal Harris and Hugh M. Hefner request the pleasure of your company at the celebration of their marriage."

"This will be the most romantic wedding ever," Radaronline.com quoted Harris as saying.

Harris, 24, will be walking down the aisle in a Ramona Keveca gown.

"No expense is being spared," said Kellie Olisky, Playboy spokesperson.

"It isn't even a compromise, because Hefner wants Crystal to have the wedding of her dreams," she added.