Sonam is known for her "smart" style sense at red carpet events and during movie promotions.
"It's been a great experience working with her. People get disillusioned by the fashionista that they see at media events. But in reality she is a very simple girl," the 29-year-old told reporters in a group interview.
"She has seen the journey in her career right from being an AD (assistant director) to now as one of the biggest stars," he added.
Apart from showing his acting capabilities, he also crooned songs in both his films and says that he never "aspired to be a singer".
"I never aspired to be a singer. I always wanted to be an actor. I thought I am more of an actor than singer. Moreover, a singer actor lends more credibility to his work as he can lend his voice to his own character," he said.
"Having said that, I cannot sing all my songs. My voice has a certain texture and I am not a versatile singer. I can sing songs of a particular genre," he added.