David Vigliano is an American literary agent. He is the head of AGI Vigliano Literary LLC, which was formed in 2014 when Y Entertainment bought the boutique firm he founded, Vigliano Associates. Vigliano is best known for working with "headline-making" authors and for negotiating record-setting advances. Since 2002, 80 of his projects have appeared on the New York Times best seller list, with 15 hitting the #1 position.