Hollywood moms know a thing or two about birthday shout-outs β€” and Sarah Michelle Gellar is no exception. Celebrating her and Freddie Prinze Jr.'s daughter Charlotte's 15th trip around the sun, the 47-year-old alum took to on Thursday, September 15 with a sweet video that captured her teen doing a cartwheel and a backflip with "Happy Birthday" serenading in the background.

The proud mom couldn't help but gush, captioning it, "We are all jumping and flipping Charlotte because it's your 15 Birthday!! I don't know how it's possible but every year I love you more ❀️ πŸŽ‰πŸŽ πŸŽ‚." After posting to social media, it didn't take long for the comments section to light up. "Slayer in training," quipped one follower, a nod to Gellar's iconic role.

"Happy Birthday sweetheart! Each day you are becoming such a beautiful woman just like your mom 🫢🏻. Hope you have a wonderful birthday πŸŽ‚," another added. "I'm confused is this the daughter or SarahπŸ˜‚β€οΈ," joked a third.

"Awwww a little glimpse of your big girl Charlotte so kind of you Buffy...

Happy Birthday beautiful πŸ™πŸΎπŸŽ‚πŸŽˆ," chimed in another. The famous parents first crossed paths on the set of the thriller in 1997, but it wasn't until three years later that sparks really flew. They tied the knot in a private ceremony in Mexico in 2002, surrounded by family and close friends.

In an interview with in 2019, the actress opened up about what makes their marriage so strong. "I think the truth of any relationship i.