Paris Hilton was celebrating her 42nd birthday. Paris Hilton celebrates 42nd birthday with star-studded party. The celebration comes shortly after Hilton and Reum welcomed their first child. Paris Hilton revealed details about her birthday celebration, which was planned as a surprise by husband Carter Reum. Hilton shared photos with Reum, Noah Centineo, her sister Nicky Hilton, Rebel Wilson, Sia, Kimora