Alia Bhatt, Rani Mukerji and Kareena Kapoor Khan at Yash and Roohi's first birthday party. Picture Courtesy: Instagram/karanjohar.

Karan Johar is the cynosure of any Bollywood party thrown in Mumbai, but, last night was different! It was his children Yash and Roohi's first birthday and they were the apple of everyone's eyes at the intimate bash held at father Karan's Khar residence. Karan's protégés Varun Dhawan, Alia Bhatt and Sidharth Malhotra were in attendance. However, with rumours of Alia and Sidharth drifting apart, we don't know if they crossed paths or spoke to each other at the bash.