Ariana Grande marked her 31st birthday by sharing an adorable throwback video on Instagram.
Prince William turned 42 on Friday, and Kate Middleton shared a never-before-seen photo.
Jamie Lynn Spears marked daughter Maddie's birthday by sharing a collection of sweet photos and a loving caption.
Blake Shelton rang in his 48th birthday in Italy with Gwen Stefani, 10 years after the couple first met.
A source tells ET that Angelina Jolie spent her 49th birthday at home with all of her and Brad Pitt's children.
Gwen Stefani celebrates her son Kingston's 18th birthday on Instagram, sharing photos of rare family moments with Blake Shelton.
Lenny Kravitz marked his 60th birthday with his ex-wife, Lisa Bonet, and their daughter, Zoë Kravitz, in France.
The singer shares Luna, Miles, Esti and Wren with his wife, Chrissy Teigen.
Gwyneth Paltrow shares Apple and son Moses with her ex-husband, Chris Martin.
Posh Spice is celebrating her 50th birthday with special wishes from the most important people in her life.
True Thompson turns 6 on April 12 following the family's tropical getaway.
The 'Crikey! It's the Irwins' star and her family celebrated Grace's sweet day with loving tributes.
The actors were married for 13 years and share three daughters.
Rob Kardashian turned 37 on Sunday.
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