Mario Armando Lavandeira, Jr. (born March 23, 1978) is an American blogger and television personality. His blog is Perezhilton.com (formerly PageSixSixSix.com), which he writes under the pseudonym Perez Hilton. On his website Lavandeira posts gossip items about musicians, actors and celebrities. He often posts tabloid photographs over which he has added his own captions or "doodles." His blog has garnered both positive and negative attention for its brash attitude, its active "outing" of alleged closeted homosexual celebrities and for its role in the increasing coverage of celebrities in all forms of media.

Lavandeira was born in Miami, Florida to Cuban parents of Galician ancestry. He graduated in 1996 from Belen Jesuit Preparatory School and received his BA in drama from New York University. He divides his time between residences in Manhattan and Los Angeles, California, where he has lived since 2002.