Dharmendra has shared screen space with his sons in films like "Apne" and "Yamla Pagla Deewana".
Asked when the three of them will be seen together on the silver screen again, Dharmendra said: "I cannot stay away from the camera... We are thinking of some scripts with Sunny and Bobby.
"We are thinking... because without this, we can't stay and hopefully we come with a good script again."
Dharmendra, who was here to promote Sunny's forthcoming film "Ghayal Once Again", added that "if we three are there and a real script is there, then nothing else is needed."
Which film of his would Dharmendra like to remake or make a part two of?
"If you start thinking to make some sequel, it's a bit difficult. Whatever (films that) left an impact on my people (audience) that film would require to be more strong. I have to make it stronger... And doing that is very difficult," the "Loha" actor said.
Talking about his favourite Sunny Deol film, Dharmendra said: "The first film by Sunny 'Betaab' is my favourite film... My son lives the roles, he doesn't (just) act it."
Directed and written by Sunny, "Ghayal Once Again" is produced by Dharmendra. The film, which also stars actress Soha Ali Khan, is slated to release on Friday.