the film Nafrat (1973), a box office flop, continues to be popular. The dialogue "Prem naam hai mera, Prem Chopra" (My name is Prem, Prem Chopra) from the film Bobby has been very popular. Another famous Prem Chopra dialogue is from the film Souten – "Main wo bala hoon jo sheshay se pathar ko todte hai", which closely translates to "I am that trouble which crushes stones with glass". Another dialogue from Souten was – "Jinke Ghar Sheeshe Ke Hote Hain Woh Batti Bhujakar Kapde Badalte Hai". "Main jo aag lagata hoon use boojhana bhi jaanta hoon" from Kati Patang. He was the regular in villainous roles in the films with Rajesh Khanna in the lead role from 1969 to 1991 from Doli (1969) till Ghar Parivar (1991). The duo of Prem and Rajesh Khanna acted in 19 films together and 15 of them were box office hits, and they were very close friends in real life till Khanna's death. Prem quoted in an interview "Rajesh Khanna and I were considered a lucky pair and distributors used to tell Rajesh Khanna that we don't care who your heroine is, all we want to know is whether Prem Chopra is in the film." He also mouthed dialogues in the song "Aaj Pila Dey Saathi Apni" sung by Mahendra Kapoor from the film Doli (1969). He also mouthed dialogues in the song "Lo Mera Pyar Lelo" from Nafrat in 1973 with Asha Bhosle and "Kab Se Ye Dil Hai Pyaasa" from Mera Muqaddar in 1988. He played son to villainous character of actor Ajit in films like Azaad, Chhupa Rustom, Jugnu and co-starred with him in Des Pardes, Ram Balram and Barood. In the late 80s, he played second fiddle to Amrish Puri only in a few films such as Awaaz, Shahenshah and Aaj Ka Arjun. Amrish Puri had played Prem Chopra's henchman in Dostana, Immaan Dharam and a minuscule role in Naseeb. Otherwise in majority of the films from 1969 to 1991 – Prem Chopra was the main villain. In fact, in Rajesh Khanna's films from 1969 to 1991, Prem Chopra was always the main villain and was never given a henchman's role except in Awaaz. He was main villain in all films starring Manoj Kumar from 1966 to Santosh (1989). He was paired opposite actress Bindu regularly in films such as Lagan (1971), Kati Patang, Do Raaste, Daag, Chhupa Rustam,