Mumbai, Sep 28 (TIWN) Ranbir Kapoor's sister Riddhima Kapoor Sahni on Sunday started a countdown for the former's birthday.

Riddhima recently turned 40th birthday and was joined by her extended family on the occasion of her birthday. Not only this but the Kapoors also featured in a special video which was a birthday surprise for her. The video even had Neetu Kapoor, Ranbir and his girlfriend Alia Bhatt performing to the Hindi song Aap Jaisa Koi.

Alia also wished Riddhima on her 40th birthday and shared a picture with her on Instagram Stories and wrote alongside, "Happy birthday, my darling. Love you, love you, love you... wish you a lifetime of joy and happiness."