Amanda Bynes at an event for 17 Again (2009)

Adam Lambert, Matt Giraud, Lil Rounds, Kris Allen, Anoop Desai, Allison Iraheta, and Danny Gokey at an event for 17 Again (2009)

Brittany Snow at an event for 17 Again (2009)

Nick Jonas at an event for 17 Again (2009)

Judd Apatow at an event for 17 Again (2009)

Keke Palmer at an event for 17 Again (2009)

Leslie Mann, Michelle Trachtenberg, and Zac Efron at an event for 17 Again (2009)

Matthew Perry, Leslie Mann, Michelle Trachtenberg, and Zac Efron at an event for 17 Again (2009)

Adam Shankman and Vanessa Hudgens at an event for 17 Again (2009)

Kevin Jonas, Joe Jonas, and Nick Jonas at an event for 17 Again (2009)

Matthew Perry at an event for 17 Again (2009)

Michelle Trachtenberg at an event for 17 Again (2009)

Vanessa Hudgens at an event for 17 Again (2009)

Zac Efron at an event for 17 Again (2009)

Michelle Trachtenberg and Zac Efron in 17 Again (2009)

Matthew Perry, Michelle Trachtenberg, and Sterling Knight in 17 Again (2009)

Leslie Mann and Zac Efron in 17 Again (2009)

Matthew Perry and Brian Doyle-Murray in 17 Again (2009)

Thomas Lennon and Zac Efron in 17 Again (2009)

Matthew Perry and Collette Wolfe in 17 Again (2009)

Zac Efron and Sterling Knight in 17 Again (2009)

Leslie Mann and Nicole Sullivan in 17 Again (2009)

Michelle Trachtenberg, Zac Efron, and Hunter Parrish in 17 Again (2009)

Leslie Mann and Michelle Trachtenberg in 17 Again (2009)

Michelle Trachtenberg and Zac Efron at an event for 17 Again (2009)

Matthew Perry and Zac Efron in 17 Again (2009)