Their love for one another has never been in doubt, but Angelina Jolie has apparently reinforced the depth of her feelings for Brad Pitt by buying him his very own heart shaped island.

The actress has reportedly paid £12.2 million for secluded Petra as Brad prepares to celebrate his 50th birthday on December 18.

Angelina is understood to have snapped up the island, located some 50-miles away from New York City, after discovering its two sprawling properties were designed by Frank Lloyd Wright, Brad’s favourite architect.

A source told The Mirror: ‘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.’

Petra’s original cottage was erected in 1950, while its larger property was built from one of Wright’s blueprints in 2008 – 48-years after his death.

The home boasts panoramic views of the surrounding area, ceilings panelled with the finest mahogany and skylights that afford the property plenty of natural lighting.

Its spacious kitchen effortlessly juxtaposes new and old, combining conventional fixtures and fittings with highly distinctive work surfaces chiselled out of granite.

An open porch, complete with a carved wooden bench, gives the owner breath-taking views of the surrounding area, while beneath the building’s stone foundations disappear into the water.

The finer details of its intricate design will not be lost on architecture fan Brad, who once admitted that Frank Lloyd Wright ‘changed his life.’

Angelina has previously treated him to a tour of the late architect’s home, Fallingwater, in 2006.

‘He was incredibly well informed about the architecture,’ recalled Cara Armstrong, Fallingwater’s Curator of Education.

‘Experiencing Fallingwater in person, hearing the waterfall cascade under the house, was better than anything he imagined.’

Angelina is currently in Australia while she directs her new film, war biopic Unbroken, and she’s understood to have rented a property in Vaucluse, New South Wales.

The International Business Times report that her new rented abode is one of the top five most affluent suburbs in the area and offers easy access to The Gap, Sydney Harbour and the Tasman Sea.

Angelina will stay in Australia until December 2013 while she films the new movie, based on the war experiences of former POW Louie Zamperini.