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"AMELIA GRAY! 💞💞💞 Today you are 21! Happy Birthday," she captioned the snaps. "We are so proud of you and the Woman you are becoming! Love you so so so so Much!!! ❤️❤️❤️♊️🕊#505"
Rinna — who's also a longtime fan-favorite Days of Our Lives star — also shared throwback images of her daughter on her Instagram Story, including a photo of her jumping off a balcony into a pool with the caption: "Jump into 21 like…."
Amelia kicked off her birthday on Sunday with celebratory dinner.
On Sunday, Rinna shared a clip of her daughter — wearing a leopard print dress and sporting bleached eyebrows — being serenaded while sitting in front of cake with a sparkler. Harry, 70, could also be seen sitting at the table.
Rinna also posted a picture on Instagram Sunday of Amelia striking a midair pose as she jumped into a lake, writing, "Someone is almost 21 June 13 2001."
Rinna showed her pride in daughter's professional accomplishments while shopping in New York City. She shared a video on Instagram of Amelia standing in front of a screen with a video of herself playing at Alexander Wang store.
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On Friday, Rinna shared a sweet tribute to Delilah on her 24th birthday on social media.
"Happy Birthday @delilahbelle 💞 I love you to the moon and back!!!!" she wrote alongside a slideshow of photos of the mother-daughter duo.
The Real Housewives of Beverly Hills airs Wednesdays at 8 p.m. ET on Bravo.