Abhishek Bachchan has penned a heartfelt wish for niece Navya Naveli Nanda on her 21st birthday. In the social media post, the `Manmarziyaan` star also advised the 'coolest kid in the world' to remain the 'mamu`s pet' that she has always been.

Abhishek Bachchan's adorable wish for 'mamu's pet' Navya Nanda Naveli

Karan Johar just shot for an episode of 'Koffee With Karan' with his childhood friends- the Bachchan siblings. Actor Abhishek Bachchan and sister Shweta Bachchan are the newest duo to join the interesting guest-line of this season`s 'Koffee with Karan'.

Koffee With Karan: Abhishek Bachchan to share the couch with sister Shweta

Karan was reportedly joined by his close friends Shweta Bachchan Nanda, Manish Malhotra and Kaajal Anand

Karan Johar celebrates his birthday in New York

The book will get a multi-city launch in October.