Jennifer Garner Joins TikTok, Shares 'Alias' 20th Anniversary Reunion Video

Jennifer Garner is officially on TikTok!

Garner made her debut on the social media platform by celebrating the 20-year anniversary of her hit show, "Alias." The spy series ran for five seasons on ABC from 2001 to 2006.

She posted a video of her alternating between photos of her "Alias" co-stars from when they were on the show and footage of them reuniting in person. Michael Vartan, Merrin Dungey, Kevin Weisman, Gina Torres, Mia Maestro and Victor Garber were all present at the reunion.

"We're here, we're older, but we still got it," Garner wrote in the caption, adding the hashtags "#FirstTikTok" and "#Alias20."

The actress has since amassed more than 14,000 followers on TikTok, and the video, which remains her only post so far, has received nearly 30,000 likes.

"Welcome to TikTok Jennifer. 'Alias' was the best show ever. I didn't miss an episode. I would race home from work every week so I didn't miss a minute," one fan wrote.

"Welcome to TikTok, @jennifergarner!" Southern Living commented.

"I came here from Instagram. I'm so excited that you're here. Thank you for being you," another user wrote.

The "13 Going on 30" star shared the same video to Instagram, where she wrote a lengthier caption. Garner looked back at her hit action thriller series and praised creator J.J. Abrams.

"Twenty years ago this week, tonight, in fact, #Alias aired for the first time on @abcnetwork," Garner wrote. "If you're an idea born of @jjabramsofficial's brain — you're a big one; JJ's ambitious imagination pushed every department on the crew of Alias through and past the norm, it was so much FUN."

She continued, "Since the end of the show, April of 2005, running into a cast or crew member from Alias has always led to this question — When will you get everyone back together for a reunion? The 20th anniversary seemed like as good an excuse as any, so the call went out — reunion party is happening, pass it on!"

Garner said she and her co-stars missed everyone they had worked with on the project who couldn't make it to the reunion, including Abrams. The actress confessed that she "screwed up" because she scheduled the reunion on a night when he was busy.

"But man, it felt so good to be together again," Garner added.

Aside from Abrams, Bradley Cooper was visibly missing in the reunion video.

Meanwhile, Garner joked that the event was a good excuse for her to finally join TikTok. "The 20th anniversary also seemed like as good an excuse as any to join TikTok," she added. "No dot in the middle over there, but the same nonsense— jennifergarner on TikTok—I am more embarrassed for myself than you could possibly be for me, so just please—avert your gaze."

Garner said in an interview with The Hollywood Reporter in March that she would be open to reprising her role as Sydney Bristow, a double agent for the CIA, in a potential reboot of "Alias."

"Sign me up," she told the outlet. Garner also teased that she'd "grab Bradley by the scruff of his neck," referencing Cooper, who played journalist Will Tippin in the series.