Actor-turned-activist Robert Redford is to be honoured with an award for his work to save the planet.

The veteran Hollywood star has been named the 2014 recipient of the Global Environmental Leadership Award in "recognition of his enduring commitment to a range of environmental initiatives".

He will receive the accolade at a ceremony at the Citi Wang Theatre in Boston, Massachusetts in September (14).

The Global Environmental Leadership Award is presented every two years by the Walden Woods Project, which was founded in 1990 by Eagles drummer Don Henley to protect the Walden Woods in Massachusetts.

Henley, who will present Redford with the honour, says, "Bob Redford was an environmentalist long before the well-being of our natural resources became an international concern. Throughout his extraordinary career as an acclaimed actor, director, and producer, he has devoted himself to myriad environmental initiatives too lengthy to enumerate."

Redford is set to accept the award on 16 September (14) and the event, which is a fundraiser for the Walden Woods Project, will also feature a performance by the Eagles.