A with a ! Jennifer Aniston shared why the “11 11” tattoo on her wrist is so special when she paid tribute to BFF Bendewald on her .

“Happy birthday to my forever sister from another mister @andreabendewald… 37 years and counting. And the best is yet to come,” shared on her Instagram Story on Thursday, March 3, with a black and white throwback photo of the pair. The 52-year-old also shared a pic of their matching tattoos. 

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“Happy Birthday Jen! 💖🌈💖You are the best-est, most beautiful, talented, big hearted, kind and FUNNY woman on the planet! Here’s to YOU on your BIG day! Of course it’s the most 💥powerful💥 day of the year with New Moon in Aquarius!!! 🌙Makes sense that the entire Universe would be in ✨🌎✨alignment with LOVE on your birthday!” Bendewald gushed on Aniston’s birthday last month and showed off the matching ink.

“Can’t wait to celebrate and make more magical wishes! 11:11✨🙏✨ LOVE WALKING THROUGH THIS LIFETIME WITH YOU.”

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Aniston first revealed the tattoo last year and reportedly believes that the numbers are good luck as she’s very spiritual. 

“The number 11 is also special to her because of her birthday and [her dog] Norman,” a source told PEOPLE as she “still misses” her Welsh Corgie-Terrier who died in 2011. The same year, the Cake actress got her first-ever tattoo to honor the pooch and opted for his name in cursive on the inside of her foot.