A complete timeline of ’13 Going on 30′ costars Jennifer Garner and Judy Greer’s friendship

• Jennifer Garner and Judy Greer met during rehearsals for the 2004 rom-com "13 Going on 30."
• More than a decade later, the two stars are still good friends.
• Greer told Insider that Garner is the "greatest of all time" and their friendship has always been easy.
• Visit Insider's homepage for more stories.

The beloved 2004 film "13 Going on 30" gave romantic comedy fans one of the most beloved movies in the genre – and also sparked costars Jennifer Garner and Judy Greer's enduring real-life friendship.

It's been more than a decade since the movie was released, but the two actors remain close and have spoken fondly of each other.

Here's a complete timeline of Garner and Greer's friendship.

The stars met and clicked during acting rehearsals for '13 Going on 30'

"Who can ever say enough about her?" Greer, who played the cunning Lucy Wyman, told Insider during an interview for the movie's 17th anniversary. "She's literally like what everyone says, like the greatest of all time."

"Meeting her was a treat," Greer said of Garner, who starred as protagonist Jenna Rink.

The actress also said that prior to their first interaction, people told Greer that she'd "love" Garner because the "Alias" star "really likes girls. She loves her girlfriends."

Greer said that back then, hearing of an actress supporting other women was "a big deal" and made her feel more comfortable.

"Maybe now that's something that people wouldn't say because us females are really trying to stick together these days, but you know, that's a big deal, especially sometimes in professions where there's a lot of competition."

April 23, 2004: '13 Going on 30' was released in theaters

The body-swap comedy, directed by Gary Winick, also starred Mark Ruffalo and Andy Serkis. Greer credited Winick, Garner, and the producers for fostering a positive and joyful on-set environment that set the movie up to succeed.

"Working with Jen was a dream come true," Greer told Insider. "She was just a really great leader. She never complained. She was never late to work. She was professional, but she was also crazy fun. Obviously, so talented."

She continued: "When you have someone like that as No. 1 on the call sheet, you really can't complain about anything. Like you're an a--hole if you do."

Greer and Garner got along so well that the "Ant-Man" actress found it "really hard to be mean to Jen" while portraying frenemies on-screen. She even recalled apologizing when the camera cut.

October 17, 2014: Garner and Greer costarred in the movie 'Men, Women, and Children'

Garner played an overprotective mom who closely monitored her teen daughter's social media activity. Greer portrayed another mom who supported her teen daughter's online modeling presence.

Greer later said during a speech that she vividly recalled spending time with Garner off-set, "having a glass of wine after work in the hotel bar and catch up on the day and our lives and our worries and the things we were excited about and scared about."

August 20, 2018: Greer gave a heartfelt speech when Garner received a star on the Hollywood Walk of Fame.

"The reason that I'm here today because 15 years ago, someone paid me to be Jennifer Garner's best friend," Greer began. "In Hollywood, it's next to impossible to stay in touch with people after you finish a job because it's like summer camp - you get so close so fast, but real life happens after you wrap."

"From the minute I met JG at our first rehearsal for '13 Going on 30,' I knew that I really didn't want that to happen," she said.

"I was and I still am so inspired by her devotion to her girlfriends and I'm so lucky to be one of them," Greer added.

The "27 Dresses" star continued: "I know that a lot of time we like to think of the stars, they're really just like us! But I am here to tell you that Jennifer Garner is not just like us. She is better than us. And not because she's the star, but because that's just who she is."

"I'm so proud of you and even though I got paid all those years to do it, I am so lucky to be your friend every day for free now," Greer said.

September 9, 2018: Greer teared up while talking about their friendship

"I just really love her so much," said Greer during an interview for CTV's "The Social."

"She is such a special person," the actress said. "There's not a lot of people in the world that, I think, deserve everything that they have gotten, and all the success. And she is one of them."

-The Social (@TheSocialCTV) September 12, 2018

September 19, 2018: Greer reflected on the lasting impact of '13 Going on 30' during an interview on the 'Today' show

"I think people still love '13 Going on 30' because everyone can relate to wanting to go back and try it a different way," Greer said. "It's still so fun, and the humor holds up, and who doesn't love Jennifer Garner? And me, I'm mean, too. But I'm kind of naughty in the movie. But I'm lovable, in-person."

September 21, 2018: Garner starred in Greer's directorial debut, a film called 'A Happening of Monumental Proportions'

The dark comedy, which also starred Allison Janney, Common, and Storm Reid, centered on a Career Day that goes horribly wrong after a dead body is found on school grounds.

January 25, 2021: The pair met up for a quarantine walk and Garner described Greer as smart, funny, and cute

"Always the smartest. Always the funniest. Always the biggest @dodgers fan in the room. I love @missjudygreer. ♥️ #TeamJG," Garner captioned a socially-distanced selfie shared on Instagram. "p.s. Hey, JG - remember how I said I wasn't going to post you? 😬 Sorry, but you're cute."

A post shared by Jennifer Garner (@jennifer.garner)

Garner also posted a photo of Greer on her Instagram story and said, "Today I got to take a walk with one of my most favorite people ever♥️."

April 2021: Greer told Insider that their friendship has always been easy

While talking about the 30s, which is central to the plot of "13 Going on 30," Greer said that maintaining friendships is key.

"It's really important that you give your friendships some attention," she said. "It's important when you love someone to give that relationship attention."

Specifically, regarding her friendship with Garner, Greer said, "Sometimes you're going to talk a lot and sometimes you're not going to talk much and that has to be OK. I always feel like with Jen, it's always very easy with her. We can talk a lot or we can go a long time without talking."

"It's always really easy. And she's just like that," Greer added.