The characters in the movie are well-developed and play a crucial role in the plot. Shah Rukh Khan's portrayal of Surinder Sahai is excellent, and he brings a sense of vulnerability and humor to the character. Katrina Kaif, as Taani, is charming and energetic, and her chemistry with Shah Rukh Khan is undeniable. The supporting characters, including Surinder's best friend and colleague, and Taani's grandfather's friend, add to the humor and warmth of the movie.