When precocious teen Juno MacGuff (Ellen Page) becomes pregnant, she chooses a failed rock star and his wife (Jennifer Garner) to adopt her unborn child. Complications occur when Mark, the prospective father, begins viewing Juno as more than just the mother of his future child, putting both his marriage and the adoption in jeopardy.

IMDb:

http://www.imdb.com/title/tt0467406/