Jennifer Garner Receives a Sweet Birthday Surprise From Donny Osmond

As shown in a video the actress shared to Instagram on Friday, Garner was surprised by her childhood crush: Donny Osmond.

In the footage, above, Garner can be seen watching a video of Osmond singing a birthday song to her. The "13 Going on 30" star — who appeared to be sitting at a table at a restaurant with friends — watched the clip with one hand over her mouth, seemingly in shock. However, before she could even comment on the video, Osmond appeared behind her and continued singing the song.

A pleasantly surprised Garner then got up from her chair and turned around to greet Osmond, who then finished the song. The "Adam Project" actress hugged Osmond, 64, and was so flustered over the surprise that she said she needed to take off her sweater.

"I'm so hot, can I just take my sweater off?" she adorably asked as Osmond laughed.

And not only was Osmond's appearance the surprise, but he also brought along a little birthday gift for Garner as well: a birthday cake that read, "13 Going on 50. Love Donny" in icing. The words, of course, were a reference to Garner's film, "13 Going on 30."

As shown in the clip, Garner and Osmond then performed a duet together.

Garner — who will celebrate her 50th birthday on Sunday — reflected on the incredible surprise in the post's caption, writing, "My first (pre)birthday surprise was a doozy— the one and only, legend in his own time, object of my childhood adoration and devotion— @donnyosmond showed up to knock my purple socks off."

"He took an hour and a half of his day to sit with me, sing my favorites, and to give me a master class on how to be a class act," she revealed, adding, "Thank you, Donny."

Garner concluded her post by giving a shoutout to Osmond's sister, Marie, as well as his wife, Debbie, whom Garner said she "hope[s] to meet someday."

The "Yes Day" actress previously gushed over her love of Osmond in the past.

Back in 2019, Katie Couric posted a video of The Osmonds and Cher performing together to Instagram, below. The news anchor captioned the throwback clip, "If this doesn’t get you going this morning nothing will. Long live @cher and the Osmonds."

At the time, per PEOPLE, Garner commented on Couric's post, writing, "My number one biggest crush of all time @donnyosmond."

The "Alias" star's remark caught Osmond's eye, and he replied to her comment. Referencing the colorful jumpsuits Osmond and his siblings were wearing in the video, the singer quipped, "Miraculous that those jumpsuits didn't scare you away."

Osmond also gave a shoutout to Garner on his Instagram Story at the time. Alongside a screengrab of a news article about their Instagram exchange — including Garner's revelation of her childhood crush — Osmond wrote, "You learn something new every day!"

The TV host went on to add, "Congrats on being featured in @people's #BeautifulIssue 2019, @jennifer.garner. No beauty shines greater than a good heart."

Garner took to her own Instagram Story to reshare Osmond's post. Alongside his post, she wrote, "1st Grade Jennifer is freaking out right now. "I still love purple socks."