Like Miley, Trace Cyrus also shared a photo holding his baby sister for the first time. "She was a cute baby but damn that’s a beautiful mullet I was rocking," he joked of his hairstyle back in 2000.
The youngest Cyrus' parents Tish and Billy Ray shared similarly loving sentiments and adorable baby videos of the star doing what she does best -- singing. "I LOVE you so much and I know how much you LOVE me right back," Tish wrote. "We have been thru a lot of good times together and a lot of hard times, and I wouldn’t change a thing."
Though not technically part of the Cyrus clan, Lil Nas X, who teamed up with Billy Ray for a smash remix of "Old Town Road," wished his pal Noah a happy birthday on his Instagram Stories with an adorable throwback mirror selfie.
"Happy bday @noahcyrus so proud of everything you have been doing from music to fashion!" he wrote. "Wishin u a great year [white heart emojis] loveee u."
Grammy voters gave Noah Cyrus an early birthday present in November -- a best new artist nomination. The winners will be announced on March 14. Her dad Billy Ray Cyrus was nominated in that same category 28 years ago.