Bob Colacello brought together a panel of usually very private mega-collectors on Sunday to talk about Andy Warhol — including Tico Mugrabi, whose family owns 900 of the artist’s works, and Aby Rosen, who has 65 of Warhol’s commissioned portraits in his collection, from the Shah of Iran to Dolly Parton.

Also on the stage were gallerist Larry Gagosian, Peter Brant, Jane Holzer and Whitney chief curator Donna De Salvo, whom Colacello jokingly introduced as “the only person on this panel who has not made a fortune off Andy’s work.”

The Foundation for Art and Preservation in Embassies event managed to pack East Hampton’s Guild Hall at 11 a.m., and the discussion ran overtime as panelists recalled collecting Warhol works.

“I thought they’d all drop out,” later joked Colacello, who signed copies of his book, “Holy Terror,” until they sold out.

Gagosian hosted a lunch after for guests including Ronald and Jo Carole Lauder, Dorothy Lichtenstein, Blythe Danner, Jake Paltrow, Taryn Simon, Leelee Sobieski and Alec Baldwin.