His adopted daughter Pinky is married to Rakesh Roshan, making him Hrithik Roshan's maternal grand father. He belongs to the famous Khan-Roshan family.
Director J. Om Prakash managed to include into his 1980 film "Aasha" the first screen appearance of his grandson - future Hindi film superstar Hrithik Roshan, then aged only 6 - by shooting him in a music interlude without the boy's knowledge.
J .Om Prakash's wife and director Mohan Kumar's wife are real life sisters.
Also known as J. Om Prakash Juneja.
He has directed Dharmendra, Rajesh Khanna and Jeetendra but never worked with Amitabh Bachchan, Vinod Khanna and Shatrughan Sinha.