Sivakarthikeyan acted as a co-star in the movie '3' along with Dhanush. Through that movie both became close friends and having a trust on Sivakarthikeyan , Dhanush himself decided to produce this movie.
"Sathyama Neeyennaku" song was intailly written for the movie 3 whi h was finally replaced by the famous song "Why This Kolaveri Do"
Nayanthara: For her appearance in the "Local Boys" songs sequence, she designed her costume herself.