Prakash Mehra wanted Amitabh for the film but his dated were unavailable.
Prakash Mehra was very unhappy with the end product of the film. He thought it was not shown to be authentic.
Mallika Sarabhai and Prakash Mehra had major problems with each other during the making of the film Himalay Se Ooncha. The entire unit had gone to Kashmir mountains with all the filming equipment. Mallika left the schedule for no reason at all. She came from a multi millionaire family and carried herself with out a worry in the world. Mehra was angry with her stated that she might be a princess, but on the film sets she should work hard just like anybody else. Prakash Mehra stated she caused him so much grief and he never wanted to work with her again. Mallika realized what she caused and apologized and stated that if he did not sign her for another film, her career would be done and over. Prakash Mehra forgave her and signed her for Hera Pheri. But her bad behavior continued. Prakash Mehra shot a song with Mallika and Vinod Khanna. The sequence cost 4 lakhs. Prakash Mehra removed her from the movie and signed Sulakshna Pandit. Mallika Sarabhai took Prakash Mehra to court for not paying her the money agreed upon.
The dramatic back ground music (When Amitabh goes to meet his mother) in Hera Pheri,was used in the film Himalay Se Ooncha. The back ground music was released on the Himalay Se Ooncha LP record.