Eugenie's tribute to her "Mumma" quickly gained over 70,000 likes on the social media platform, with fans posting their well-wishes in the comments.
"Awwww so sweet," wrote one fan.
"Sharing my birthday with your mumma xx" said another.
Another commented: ”A beautiful, strong, and positive role model for many.”
The Duchess of York and her youngest daughter, Eugenie, recently teamed up at a charity event for street children.
Speaking to Hello! at the event, Sarah praised both her daughters to the hilt.
She said: "I am the luckiest woman alive to have two extraordinary girls who work so hard in their charity work.
"They are the best examples of what true, proper ambassadors for life should be.
“They are desperately humble and so kind, genuinely love and enjoy life and I believe it's because we all work so hard at good mothering, being good girls and talking about everything.”
Prince Andrew also posted birthday well-wishes to his ex wife on social media.
Taking to Instagram, the Duke of York shared a series of photographs of Fergie, along with the caption: "Wishing @sarahferguson15 a very Happy 60th Birthday!"