The 48-year-old actor said he did not give any suggestions to Sunny, who is ready with his upcoming action-drama "Ghayal: Once Again".
"I didn't contribute anything to the film. We don't like to interfere in each other's work. I wouldn't want him to get bogged down by what someone else is saying. It's his vision and creative side," Bobby told PTI.
"I did 'Dillagi' with him which was one of my best performances. I have a lot of faith in him and I have a feeling that it's going to be a great film which people are going to enjoy," he said.
Bobby says it is difficult to don the hat of a director, producer and actor in one film, but his brother has pulled it off with ease.
"I am really excited for the film. He has really worked hard. He has directed the film and has put all his effort into it. It's been tough producing, directing and acting in a film, but my brother is as tough in real life as he is on screen," he said.
The actor says he is currently looking for scripts and has no plans of following into the footsteps of his brother and turning a director.
"I am looking for good scripts, working on things, so let's see. But I can't write, and directing is a big job. It's something which people have a knack for," he said.
"There are good writers who can't be good directors, and there were lots of actors who tried directing but they couldn't. So it's something which people have in them. You can't figure out how it happens," he said.