Actor Ranveer Singh is famous for his gimmicks and the actor himself says that he finds it difficult to stay serious for a long time.

The 28-year-old was seen essaying a very serious character in the movie "Lootera" and he had a very difficult time shooting for it.

"I find it very difficult to stay serious for a long time," Ranveer said during the shooting of UTV Stars' show "Breakfast To Dinner".

The episode of "Breakfast To Dinner" featuring Ranveer will air Sunday.