Her sister Gigi was the first, sharing a sexy bikini snap of her baby sister her 'very own custom cabbage patch kid.'
Everyone from her famous family members to designers she has worked with took to social media to send her good wishes and post throwback photos.
Just 17-months older, Gigi cradled a baby Bella in her lap in the throwback photo.
She declared October 9 '[International] Bella Hadid Day,' she wrote. 'My very own custom cabbage patch kid I raised right from the seedling.'
In the throwback photo the bathing suit clad youngins sit on the sand as the water comes in.
The 24-year-old went on to share two, recent, black and white photos of the sisters.
She continued to praise her 'custom bestie sweet sissy' on her big day.
'Your big heart and contagious light bless every life you touch,' Gigi wrote. 'I’m lucky and grateful to do it all with you. I LOVE YOU MORE THAN WORDS.'
And she continued the parade of throwback photos on her Instagram story, sharing more old and recent photos of them together.
Their mom, Yolanda Hadid, was also sure to celebrate her youngest daughter.
She gushed over Bella saying 'I am so proud of all that you have accomplished in this early stage of life but more so of the resilient young woman you’ve become while navigating this life with kindness and grace!'
'I love your beautiful compassionate heart and the extraordinary ability to see good in everything and everyone no matter what the circumstances,' she added. 'Your greatest strength is ... your inner beauty and magnetic force you carry within your heart, the magic we all feel when you touch our lives.' (Fri 11) Views: 1,299
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