Author Twinkle Khanna, on Tuesday, showered her younger sister Rinke Khanna with a lovely birthday wish on social media.

On Instagram, Twinkle posted a candid picture of Rinke and wrote: "Happy birthday Rinkston! Here`s to someone who can make me laugh at the most somber moments. The last lot of Rinkes was manufactured in the seventies and they have clearly lost the mould, because they don`t make sisters like you anymore."