It stars Zac Efron, Leslie Mann, Thomas Lennon, and Michelle Trachtenberg, with Melora Hardin, Sterling Knight, and Matthew Perry in supporting roles.

The film was distributed by Warner Bros. Pictures and released in the United States on April 17, 2009, to mixed reviews from critics, but grossed $139.5 million.

Mike plays the first few seconds of the game before walking off the court to go after Scarlet, abandoning his hopes of going to college and eventually a professional basketball career.

After he exits, Scarlet notices that the "letter" is actually directions to the courtroom; she begins to grow curious and postpones the divorce by a month.

As Mike prepares for his first day as the new basketball coach at his kids' school, Ned—who has successfully started a relationship with Jane, the principal—gifts him a whistle.

The site's critics consensus reads, "Though it uses a well-worn formula, 17 Again has just enough Zac Efron charm to result in a harmless, pleasurable teen comedy.

[5] Roger Ebert gave the film 3 stars out of 4, writing: "17 Again is pleasant, harmless PG-13 entertainment, with a plot a little more surprising and acting a little better than I expected.

"[6] Justin Chang of Variety wrote: "Zac Efron's squeaky-clean tweener-bait profile is unlikely to be threatened by 17 Again, an energetic but earthbound comic fantasy that borrows a few moves, if little inspiration, from Big and It's a Wonderful Life.

[8] Opening in 3,255 theaters in the United States and Canada, the film grossed $23.7 million, ranking #1 at the box office, with 70% of the audience consisting of young females.

A South Korean television series titled 18 Again based on the film aired on JTBC from September 21 to November 10, 2020.