Lead actor Ranveer Singh had no prior experience in acting or modeling yet was hired after his first audition, having thoroughly impressed producer/Yash Raj Films vice chairman Aditya Chopra.
There was much confusion on set for peripheral crew members and curious onlookers during shooting on February 17th in Delhi due to lead actor Ranveer Singh being a complete unknown. Some thought he was Ranbir Kapoor, while others claimed he was Ranvir Shorey and some even suggested Riteish Deshmukh. Some cops brought to secure the set that chilly morning complained about having to be there in the cold despite the lead actor being a nobody and lead actress Anushka Sharma being virtually unknown as well.
After the commercial and critical success of the film, they put up a note on the home page of the official website saying 'Bread Pakode Ki Kasam HIT Hai' ( (I swear) in the name of a Bread Pakora, the movie is a success.) That's a homage to the seen, in which Bittu swears his friendship to Shruti, in the name of Bread Pakora( fried sandwich covered in gram flour paste.)
Ranbir Kapoor refused to play the role of Bitoo Sharma, years later he would express his regret on choosing not doing the movie on Kofee With Karan.
The song 'Bari Barsi' is based on a very popular and old Punjabi folk music 'Boliyan'. The most famous version was done by Johnny Zee (Taz of Stereo Nation) in the song " Gehra Dede" from the album Hit The Deck which was released in 1989. The phrase "Bari Barsi Khatan Gaya Si" is welcomed with different responses each time it is repeated. This phrase could have a few different meanings, one of the meaning is "I was away(working) for a dozen years" . which means that the person in question was away earning for long years, he's now back home, and then the boli goes like "khat ke leyanda ..." which means "I brought back..." . The object that was brought home is changed every time in a boli like this. So it could be anything & one creates its own boli on ad-lib.