The 87-year-old magazine publisher shared photos of his costume on Twitter before the Mansion Halloween party kicked off.
"Robin Thicke & Miley Cyrus #VMAs," Hefner captioned the first image.
The Playboy founder wore a black and white striped suit while his 27-year-old wife rocked a skin tight dress in nude. Harris also wore her hair in two top knots and was seen holding (the infamous foam finger), just like Cyrus did in her VMA's 2013 performance, while twerking on her husband.
But Hefner and Harris weren't the only ones to dress up as the controversial singers this Halloween. Former professional party girl Paris Hilton was also spotted in a Miley Cyrus VMA's costume at the Mansion Halloween party.
This is the first Halloween Hefner and the Playboy model spent as a married couple after the two tied the knot on New Year's Eve 2013.