Mamoru Oshii's latest animated film, "The Sky Crawlers," now has an official theme song in the form of "Konya mo Hoshi ni Dakarete," a new ballad by young singer Ayaka.

The song was initially planned to be used as an image song that would appear in the movie's trailer, but after listening to the finished work, Oshii felt it matched the film so well that he decided to use it during the ending credits as the theme song. The director is known for avoiding the use of existing music in his works, but he made a rare exception this time, even going as far as redoing the credits to better incorporate the song.

"The Sky Crawlers" is also unusual for Oshii due to its choice of voice cast. He normally uses professional seiyus, but in April it was revealed that Rinko Kikuchi, Ryo Kase, Chiaki Kuriyama, and Shosuke Tanihara are lending their voices to the film.

"Konya mo Hoshi ni Dakarete" is the final track on Ayaka's sophomore album, "Sing to the Sky," which goes on sale June 25. "The Sky Crawlers" will hit theaters more than a month later on August 2.