Leonardo DiCaprio has bought a "groundbreaking" eco-friendly apartment.

The 'Titanic' actor - who is an outspoken environmentalist - has purchased a 'green' flat in New York's pioneering Riverhouse complex, which offers one-bedroom properties from $835,000 and four-bedroom homes from $2,975,000.

DiCaprio's representative confirmed the sale, but did not reveal how much the star had paid, saying: "Riverhouse is a prime example of how green technology is both accessible and achievable for new residential developments - it is a groundbreaking building."

Riverhouse is described as "the highest performance green living in Manhattan condominiums".

The 264-unit complex in Rockefeller Park was built using locally acquired renewable materials, is partly powered by solar energy, offers a 24-hour fresh-filtered air system and boasts green rooftops planted with pine trees. Riverhouse residents also have access to a children's playroom, media cafe, fitness center, dog spa and a tree house.

DiCaprio has long been an ardent campaigner on green issues. He was one of the first people to buy a hybrid car and has established his environment awareness organization the Leonardo DiCaprio Foundation. He also co-wrote and produced 'The 11th Hour', a documentary about why the planet is in crisis.

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