Karina Smirnoff's 'Playboy' issue will be unforgettable: Hugh Hefner

Hugh Hefner has announced that Dancing with the Stars pro Karina Smirnoff will go nude for Playboy's May issue, and insisted that it's going to be "unforgettable."

Hefner tweeted: "The May issue of Playboy is unforgettable with Dancing With The Stars' Karina Smirnoff on the cover & nude inside," reports Radaronline.com.

The 33-year-old Russian dancer is a five-time US National Champion and has been ranked second in the world, but this is her first time posing for Playboy.

Hefner has been prominent on the set of Dancing with the Stars this season not only because of his work with Smirnoff, but his former girlfriend Kendra Wilkinson is a contestant on the show.