Hugh Hefner

Hugh Hefner and Crystal Harris have set a wedding date. The 84-year-old Playboy founder and his 24-year-old fiancée will tie the knot June 18 at the Playboy Mansion.

The wedding will be 'intimate' with fewer than 300 guests. Playboy Playmate Harris is still hunting for the perfect wedding dress but considering a strapless gown by designer Romona Keveza.

One person who won't attend: Hefner's ex, Holly Madison. She told PopEater the attention 'should be on them. It shouldn't be about ex-girlfriends showing up and what are their reactions and stuff like that.'

When the engagement news broke in December, former 'Girls Next Door' star Kendra Wilkinson said she was 'not surprised,' while co-star Bridget Marquardt sent cupcakes to the couple and called herself 'totally happy for them.'