Hefner's ex quits as 'editor'

Playboy boss Hugh Hefner's ex-girlfriend has resigned as the magazine's Playmate editor.

Holly Madison split from Hef in 2008 after being the publisher's 'number one' girlfriend for four years.

She appears in a naked spread, alongside Hefner's other two exes Kendra Wilkinson and Bridget Marquardt, in the current issue of the magazine.

Reports suggest Madison, who also stars in Playboy reality show 'The Girls Next Door', quit the publication so she could spend more time in Las Vegas with illusionist beau Criss Angel.