Kajol took to Instagram on Saturday to wish her daughter Nysa Devgan on her 21st birthday. Kajol and actor-husband Ajay Devgn have two children – daughter Nysa and son Yug Devgan, 13. Sharing three pictures of the birthday girl, the actor penned a sweet note for her 'darling'. Also read: Ajay Devgn and Kajol's son Yug kisses his grandma on her birthday, Nysa makes cameoKajol's birthday post for NysaKajol wrote, "Happy 21st my darling.. may u always smile and laugh with this same joie de vivre... Read this story