London, Nov 28 - American actress Jessica Biel, who has lent her voice to an extra-terrestrial being in new animated movie "Planet 51", says she does believe that there's life on other planets.

"I definitely believe in the possibility of intelligent life on other planets. There's just so much space out there not to believe in that. For me, the idea with this movie is to be open to change," Biel was quoted as saying by contactmusic. com.

"You should be accepting of change because, only through change, can you grow and learn more about yourself, as a human or alien," she added.

The "Illusionist" actress also said she enjoyed working on "Planet 51".

"It was just fun. I wanted to do it because it was speaking to my inner child. Yes, I want to be an alien. Yes, I want to be green," she said. (IANS)