Helen and K.N. Singh have appeared together in 13 films between 1951 and 1980, with a combined box office of ₹23.7 crore. Every shared film with year, roles and gross, plus who else each works with most.
| Year | Film | Box office |
|---|---|---|
| 1951 | Awaara | ₹15.6 crore |
| 1958 | Chalti Ka Naam Gaadi | ₹2.5 crore |
| 1958 | Howrah Bridge | ₹1.1 crore |
| 1958 | Kabhi Andhera Kabhi Ujala | |
| 1961 | Sapne Suhane | |
| 1963 | Shikari | |
| 1964 | Woh Kaun Thi? | |
| 1966 | Teesri Manzil | |
| 1971 | Hum Tum Aur Woh | |
| 1971 | Jaane-Anjaane | |
| 1972 | Mere Jeevan Saathi | ₹4.5 crore |
| 1977 | Agent Vinod | |
| 1980 | Dostana |
Helen also often with: Madan Puri (32), Tun Tun (27), Ashok Kumar (23), Iftekhar (21), Pran Sikand (21)
K.N. Singh also often with: Dev Anand (13), K. N. Singh (13), Johnny Walker (12), Raj Khosla (12), Tun Tun (10)