On his Twitter.com page, Playboy founder Hugh Hefner writes, "Pamela Anderson is in the Mansion swimming pool, posing for the January cover in a tribute to 'La Dolce Vita'."
Anderson first graced Playboy's cover in 1989, later being named as Playmate of the Year in 1990.
Anderson, who will be 43 in January, last posed for Playboy's cover in 2007.
Three years later, Anderson is prancing around naked in a pool as an homage to Anita Ekberg's infamous scene in Rome's Trevi Fountain with Marcello Mastroianni in the 1960 movie classic "La Dolce Vita."