Zac Efron loaned his voice to new animated movie Dr. Seuss' The Lorax in a bid to help make youngsters more aware of environmental issues.
Danny DeVito voices Seuss creation The Lorax as it fights to halt the destruction of the world's forests, and Efron, who portrays a young boy who sets out to find out why the world has become so ugly, hopes the eco-friendly messages in the film will inspire kids.
He tells Teen Hollywood, "I try to be green, as much as I can. It's hard. I feel like I'm never doing enough... I've always been searching for a way to get more involved and to help, and I felt like this movie, with the message that it has, was a really organic way to be able to help and get involved for me as an actor because there are only so many things you can do.
"This is a way, through a film, to teach and hopefully get the message out to young kids, and as they say in the movie it only takes one seed. So, I think we're planting those seeds."