"Karan is like a guru to me. Whatever I have learned is from him. I have a personal relationship with him. If he asks me to do something, I will do it. I trust him blindly," said Varun.
Currently in the midst of promotions of SOTY, the 24-year-old worked as assistant director to Johar on "My Name Is Khan".
The actor says he has received offers from outside Dharma Productions as well, but it was too early to talk about them at the moment.
"I have got offers but I am not allowed to talk about it. We have a contract of three films with Dharma," he said.
Besides Varun, Alia - Mahesh Bhatt-Soni Razdan's daughter - and model Siddharth are making their debut in the film that also has names like Boman Irani's son Kayoze Irani and actress Sana Saeed, who played Shah Rukh Khan's daughter in "Kuch Kuch Hota Hai".
Co-produced by Shah Rukh, the film is slated for an Oct 19 release.