Spider-Man has become the first Super Hero Ambassador for Earth Hour, the global environmental movement organised by the World Wide Fund for Nature (WWF).
The announcement coincides with the launch of Earth Hour Blue, described as "a radical new digital crowdfunding and crowdsourcing platform for the planet".
Earth Hour's famous Lights Out event takes place this year on Saturday March 29, at 8:30pm.
The Amazing Spider-Man 2 star Andrew Garfield said: "I'm proud Spider-Man is the first Super Hero Ambassador for Earth Hour because he shows we can all be Super Heroes when we realise the power we all have."
Garfield continued: "Earth Hour is a movement that has created massive impact around the world, so imagine what we can do this year with Spider-Man by our side."
His co-star, Emma Stone, added: "Earth Hour gives you the power to inspire anyone, even if you're just one person, and Earth Hour is much more than an hour. There are great projects from the crowd, for the planet, happening all over the world."
The Amazing Spider-Man 2 will be released in cinemas on Wednesday April 16.
To find out more about Earth Hour and Earth Hour Blue, visit: http://www.wwf.org.uk/