Summary of the film.

JUNO.
Juno, a girl who is sexteen yerars old, discovers she is pregnant with a child fathered by her friend and longtime admirer, Paulie Bleeker. While at first she intends to have an abortion, she changes her mind and decides to make a plan for the child's adoption.

With the help of her friend Leah , Juno searches the ads and finds a couple. Along with her father, Mac , Juno meets the couple, Mark and Vanessa Loring , in their expensive home and expresses a desire for a closed adoption. However, Juno and Leah happen to see Vanessa in a shopping mall being completely at ease with a child, and Juno encourages Vanessa to talk to Juno's baby in the womb, where it obligingly kicks for her. On the other hand, Juno more easily forms a friendship with Mark. Both like a punk rock and horror films.Mark, who has set aside his rock band youth , works at home composing commercial jingles. Juno hangs out with Mark a few times, ignoring a warning from her stepmother Bren that she shouldn't spend time alone with a married man. Juno struggles with the emotions she feels for her baby's father, Paulie, who is clearly in love with Juno. She maintains an outwardly indifferent attitude toward Paulie, but when she knows that he has asked to another girl to the prom, she is hurt and angrily confronts him.Not long before her baby is due, Juno is again visiting with Mark when their interaction becomes strongly emotional. Mark then tells her that he will be leaving Vanessa. Vanessa arrives home, and, to her shock, Mark tells her he does not feel ready to be a father. Juno makes a decision.

After a discussion with Mac, Juno accepts that she loves Paulie. He goes to the hospital to stay with Juno in her childbirth. Vanessa comes to the hospital where she joyfully claims the newborn boy as a single adoptive mother. On the wall in the baby's new nursery, Vanessa has framed Juno's note—addressed only to her—which reads "Vanessa: If you're still in, I'm still in. —Juno."
The film ends in the summertime with Juno and Paulie playing guitar and singing together, followed by a kiss.