The Girls Next Door takes viewers beyond the gates and behind the closed doors of the world's most famous English Tudor to reveal life inside Hugh Hefner's mansion as it has never been seen before: through the eyes of the women who live, play and party with him. It's the secret side of an American legend and the fabled home that has captivated the imagination of millions.

In this new season, fans are introduced to the new beauties, including Crystal Harris, his new 'number one' girlfriend, who was born in Arizona and raised in San Diego. This 23-year-old met Hef at last year's Playboy Halloween Party and moved in one month later. Hef and Crystal bonded immediately over the heartbreak they shared from the recent loss of loved ones.

Nineteen-year-old identical twin sisters Karissa and Kristina from Clearwater, Florida, came to the Mansion for the first time where they were handpicked by Holly as finalists during the 55th Anniversary Playmate search. The twins are the first Playmates to share a double issue as 2009's Miss July and Miss August.