Angelina, 38, was excited after discovering its two homes were designed by his favourite architect Frank Lloyd Wright.
Angelina Jolie is splashing out £12.2million to buy Brad Pitt a heart-shaped island.
The film beauty visited stunning Petra last week and thought it would be a perfect 50th birthday gift for her superstar partner.
Angelina, 38, was particularly excited after discovering its two homes were designed by Brad’s favourite architect Frank Lloyd Wright.
A source revealed: “As soon as Angelina heard the island was on the market she arranged a viewing. She was really impressed.
“The house is perfect for romantic getaways or as a family retreat. It’s very private. And Angelina knows the fact the island is in the shape of a heart will mean so much to him.”
Exclusive 11-acre Petra – which has a helicopter pad – is off the US coast 50 miles north of New York City.
The cottage was put up in 1950, nine years before Wright’s death. The main house was built in 2008 from a Wright plan and is one of his most spectacular designs.
Boasting vast expanses of stone, cement, mahogany and skylights, it is a triumph of modern architecture and would be a perfect getaway for Brad and Angelina’s children Maddox, 12, Pax, nine, Zahara, eight, Shiloh, seven, Vivienne and Knox, both five.
Architect fanatic Brad, who turns 50 on December 18, once said: “When I discovered Charles Rennie Mackintosh and Frank Lloyd Wright, it changed my life.”
In 2006 Angelina took Brad on a tour of Wright’s home Fallingwater which was completed in 1939.
Cara Armstrong, Fallingwater’s Curator of Education said: “He was incredibly well-informed about architecture.
“Experiencing Fallingwater in person, hearing the waterfall cascade under the house was better than anything he imagined.”
In 2011, for Brad’s 48th birthday, Angelina bought a waterfall in California so he could build a house over it inspired by Fallingwater.
The source added: “The fact he could now live in a house designed by one of his idols will make this his best birthday present ever.”
Ocean’s 11 star Brad and Oscar winner Angelina have been together since 2005.