"My wife and I are building a house and one of the things we're looking into since we're building from the ground up is all the different ways to make it environmentally sound," says Seth Green (pictured above). "I want a lot of LED stuff, low impact. We've already been working on it for a year." Thanks to the innovation that is performance capture, Green plays a nine-year-old version of himself in the animated movie "Mars Needs Moms," about a kid whose mother is kidnapped and taken to the Red Planet and he stows away to save her. "It's just like 'Avatar,'" Green compares. "You see all my facial expressions in this character. It's a really unique medium. It was an amazing experience for me as an actor."

Mindy Sterling had a great time voicing the villain of the piece, speaking "Martian," and wearing a special helmet and costume on the performance capture stage. "I love the idea that it's so cutting edge and you get to act and they put you together and create the character," said Sterling at the "Mars Needs Moms" premiere. A recycler who turns off the water when she brushes her teeth to counterbalance the long showers she loves, Sterling has a recurring role on Desperate Housewives and will have another in the Disney Channel series "A.N.T. Farm."

"I recycle everything and I try to use natural products," said Elisabeth Harnois, who plays renegade Martian Ki, who helps the hero in his quest in the movie, which opens March 11. Making it was an unusual experience. "There's no cameras in your face, there's no lighting set-ups, it feels like you're doing a play but you're tumbling around the room with all these other actors," she notes. As for the movie's message about love and the importance of family, "it's taught me to call my mom more."

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Photos: ZUMA Press

Seth Green and his 'Mars Needs Moms' co-stars reveal their eco sides
"My wife and I are building a house and one of the things we're looking into since we're building from the ground up is all the different ways to make it enviro