Janhvi's cousin actress Sonam Kapoor shared a picture of her calling her a "strong woman".
This is what Sonam wrote: "To one of the strongest girls I know, who became a woman today. Happy birthday, jannu".
Designer and Sridevi's close friend Manish Malhotra too posted a birthday note for the young girl.
He wrote: "Happy Birthday, my dearest Janhvi. May God bless you with happiness, love, peace and just everything."
The elder daughter of Sridevi who lost her mother before her debut film recently wrote a long post urging all her followers to respect and cherish their parents.
She is making her Bollywood debut opposite Shahid Kapoor's brother Ishaan Khattar with Karan Johar's film Dhadak.
Sridevi died on February 24 by accidental drowning in a bathtub in Dubai where she went to attend nephew Mohit Marwah's wedding.