Kalki Koechlin , Aditya Roy Kapoor , and Deepika Padukone worked together in the same film .
Co-starring alongside Ranbir Kapoor , Kalki Koechlin , and Aditya Roy Kapoor , she was cast as Naina Talwar , a `` shy wallflower , '' which marked a departure from the glamorous characters that she had a reputation for portraying .