By Morgan Klosterman
5:41 PM PDT, April 22, 2024
On April 23, 2024, 13 Going on 30 celebrates its 20-year anniversary! In the 2004 classic, schoolgirl Jenna Rink makes an unusual wish on her birthday. Miraculously, her wish comes true and the 13-year-old Jenna wakes up the next day as a 30-year-old woman.
From Jennifer Garner to Mark Ruffalo, check out what the stars of the beloved rom-com looked like way back when and how they appear now!
Jennifer Garner
![Jennifer Garner](https://www.etonline.com/sites/default/files/styles/640xh/public/images/2024-04/mk-Jennifer-Garner-1280-X-720-HERO-2-SPLIT.jpg?width=1024&quality=80)
Garner plays the older version of Jenna Rink when she wakes up as a 30-year-old woman.
Mark Ruffalo
![Mark Ruffalo](https://www.etonline.com/sites/default/files/styles/640xh/public/images/2024-04/mk-Mark-Ruffalo-1280-X-720-HERO-2-SPLIT.jpg?width=1024&quality=80)
Ruffalo plays the older version of Matty. He reconnects with Jenna in their 30s when she comes knocking on his door.
Judy Greer
![Judy Greer](https://www.etonline.com/sites/default/files/styles/640xh/public/images/2024-04/mk-Judy-Greer-2-1280-X-720-HERO-2-SPLIT.jpg?width=1024&quality=80)
Greer plays the older version of Lucy Wyman, the mean girl in Jenna's school. Lucy is now Jenna's best friend in her 30s.
Christa B. Allen
![Christa B. Allen](https://www.etonline.com/sites/default/files/styles/640xh/public/images/2024-04/mk-Christa-B.-Allen-1280-X-720-HERO-2-SPLIT.jpg?width=1024&quality=80)
Allen plays Jenna Rink when she is 13.
Sean Marquette
![Sean Marquette](https://www.etonline.com/sites/default/files/styles/640xh/public/images/2024-04/mk-Sean-Marquette-1280-X-720-HERO-2-SPLIT.jpg?width=1024&quality=80)
Marquette plays Matty in his younger years, when he and Jenna are best friends.
Lynn Collins
![Lynn Collins](https://www.etonline.com/sites/default/files/styles/640xh/public/images/2024-04/mk-Lynn-Collins-1280-X-720-HERO-2-SPLIT.jpg?width=1024&quality=80)
Collins plays Wendy, the girlfriend of the older version of Matty.
Kiersten Warren
![Kiersten Warren](https://www.etonline.com/sites/default/files/styles/640xh/public/images/2024-04/mk-Kiersten-Warren-1280-X-720-HERO-2-SPLIT.jpg?width=1024&quality=80)
Warren plays Trish Sackett, a business rival of 30-year-old Jenna.
Kathy Baker
![Kathy Baker](https://www.etonline.com/sites/default/files/styles/640xh/public/images/2024-04/mk-Kathy-Baker-1280-X-720-HERO-2-SPLIT.jpg?width=1024&quality=80)
Baker plays Jenna Rink's mother.
Andy Serkis
![Andy Serkis](https://www.etonline.com/sites/default/files/styles/640xh/public/images/2024-04/mk-andy-serkis-1280-X-720-HERO-2-SPLIT.jpg?width=1024&quality=80)
Serkis plays Richard Kneeland, Jenna Rink's boss at the magazine she works at.
Alexandra Kyle
![Alexandra Kyle](https://www.etonline.com/sites/default/files/styles/640xh/public/images/2024-04/mk-Alexandra-Kyle-1280-X-720-HERO-2-SPLIT.jpg?width=1024&quality=80)
Kyle plays the younger version of Lucy Wyman, the head of the popular kids who makes Jenna's life worse by picking on her.
Ashley Benson
![Ashley Benson](https://www.etonline.com/sites/default/files/styles/640xh/public/images/2024-04/mk-Ashley-Benson-1280-X-720-HERO-2-SPLIT.jpg?width=1024&quality=80)
Benson plays Six Chick #2, who is in the cool kids group among Jenna's peers.
Brie Larson
![Brie Larson](https://www.etonline.com/sites/default/files/styles/640xh/public/images/2024-04/mk-Brie-Larson-1280-X-720-HERO-2-SPLIT.jpg?width=1024&quality=80)
Larson plays Six Chick #3, who is in the popular group at Jenna's school.
Jim Gaffigan
![Jim Gaffigan](https://www.etonline.com/sites/default/files/styles/640xh/public/images/2024-04/mk-Jim-Gaffigan-1280-X-720-HERO-2-SPLIT.jpg?width=1024&quality=80)
Gaffigan plays Chris Grandy, the older worn-out version of Jenna's 13-year-old crush.
Marcia DeBonis
![Marcia DeBonis](https://www.etonline.com/sites/default/files/styles/640xh/public/images/2024-04/mk-Marcia-DeBonis-1280-X-720-HERO-2-SPLIT.jpg?width=1024&quality=80)
DeBonis plays Arlene, Jenna's assistant at the magazine firm.
Renee Olstead
![Renee Olstead](https://www.etonline.com/sites/default/files/styles/640xh/public/images/2024-04/mk-Renee-Olstead-1280-X-720-HERO-2-SPLIT.jpg?width=1024&quality=80)
Olstead plays Becky, the neighbor of Jenna when she is older. Jenna befriends Becky since she also has the mentality of a 13-year-old.