Kim Kardashian Wishes Bruce Jenner Happy Birthday: 'You're Officially A Senior Citizen!'

Brody, Kendall and Kylie Jenner join in with the HBDs.

After you're 25 years old and are able to rent a car, your birthdays become kind of pointless. (I mean, still use 'em as an excuse to act like a gigantic baby in adult people clothes, but I'm just saying.) Until you hit 65 like Bruce Jenner has, that is.

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The "Keeping Up With The Kardashians" star rang in their first official birthday as a senior citizen on Tuesday (October 28), and Kim Kardashian, Kendall Jenner and Kylie Jenner made sure to celebrate Bruce's big day right. Check out some of the kids' Instagrammed b'day wishes below.

Kim: "Bruce!!!! Happy Birthday!!!!! You're officially a senior citizen! Lol have the best birthday ever!!"

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Kendall: "happy birthday to my dad, my everything!"

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Kylie: "happy birthday daddio I love you"

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Son Brandon Jenner: "Happy birthday to this cowboy! Love you dad."

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Daughter-in-law Leah Jenner: "Happy birthday to one of my personal heroes. I love you and am honored to call you family. #happybirthdaybruce"

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