Uncensored photos of Lohan's shoot, in which she emulates Marilyn Monroe, appeared online Friday, including on PerezHilton.com.
"Someone took photos of Lindsay's pictorial in an advanced copy of the January/February issue," a spokesperson for the magazine initially told MTV News. "They posted the photos online without permission. We are not releasing any official images or information until December 15."
TMZ.com reported earlier Friday that Playboy was concerned that the leak will hurt sales of what they expect to be the bestseller of the year. Late Friday, Playboy boss Hugh Hefner tweeted: "Because of the interest & the Internet leak, we're releasing the Lindsay Lohan issue early." The new release date has not yet been announced.