Jai Om Yadav Mukherjee (24 February 1939–9 March 2012) was an Indian film actor and director.
Joy debuted opposite Sadhana in the film Love in Simla (1960) directed by R.K. Nayyar. He then starred with Asha Parekh for several hits like Phir Wohi Dil Laya Hoon, Love in Tokyo and Ziddi. Some of his films like Door Ki Aawaz, Aao Pyar Karen and Shagird (opposite Saira Bano), Ek Musafir Ek Haseena with Sadhna, ‘Ishaara’ with Vyjayantimala and ‘Jee Chahta Hai’ with Rajashree were superhit movies. Most of his movies had hit music. By the late 1960s acting roles began drying up, so he began directing and producing.
He produced and directed Humsaya although neither that film nor his subsequent films as producer or director did well. Despite a late success with home production Ek Baar Muskura Do (1972) with brother Deb Mukherjee and later to be sister-in-law Tanuja, Joy faded from the silver screen.