Actors Ranbir Kapoor and Alia Bhatt have returned to Mumbai from Alibaug after the demise of their close friend Ayan Mukerji's father Deb Mukherjee. The couple, along with their friends and family, left for Alibaug on Thursday for Alia's 32nd birthday. Apart from the couple, several celebrities including Deb's niece Kajol, Karan Johar, Jaya Bachchan, Shweta Bachchan reached Ayan's residence.