Us Weekly said it took months of coordinating, but the couples were finally able to meet for the first time Friday afternoon.
"The Duke and Duchess of Cambridge met with Brad Pitt and Angelina Jolie Pitt at Kensington Palace on Friday afternoon," a Kensington Palace spokesman told the magazine. "They discussed their shared interest in combatting the illegal wildlife trade."
"Everyone got on splendidly," an unnamed insider dished. "Brad and Angelina spent much longer with the Duke and Duchess than planned. They ended up staying for almost a few hours."
Jolie and Pitt, along with their six children, are in town for the weekend so the actress and humanitarian could attend a lunch at the Foreign & Commonwealth Office Monday.