Trivia
1. Fawad Khan and Ratna Phatak's second film where they play son and mother. First was Khoobsurat with Sonam Kapoor. Khoobsurat also happened to be Fawad Khan's first Bollywood film.
2. Akshay Kumar was offered Fawad Khan's role but declined due to him not liking the character.
3. Saif Ali Khan was also offered Fawad Khan's role but was declined due to a busy schedule.
4. In the movie, Alia Bhatt says that she doesn't like flying. In real life also Alia has fear of flying along with fear of darkness and failure.
5. Rishi Kapoor played an 80-year-old for the first time using prosthetic makeup and won awards.
6. At 2:02:39 Fawad Khan's character Rahul Kapoor is seen reading the book The Perks of Being a Wallflower by Stephen Chbosky.
7. The end-credit song "Let's Nacho" is adapted from the song "Tamil Fever" by Nucleya and Benny Dayal. The end credit song has a small verse of the Tamil lyrics, and the rest are contributed/sung by Badshah. During the movie, the original song can be heard playing in the background when Rahul and Tia are dancing in the restaurant.
8. Fawad Khan's first breakthrough movie was Khuda key like which was also based around a dysfunctional family.
9. Fawad Khan's first film with Rishi Kapoor
10. Actor Akshay Kumar was initially offered Fawad Khan's role but had declined it as the character didn't resonate with him. Saif Ali Khan declined the role as well due to his busy schedule.
11. The movie had garnered five Film fare awards and was nominated for the Best Film category.
12. Siddharth Malhotra and Fawad Khan often had conversations about the diversity of places and cultures of India and Pakistan. Fawad has visited many locations while shooting in India, but Sidharth has never been to Pakistan. He has heard many things about the place through Fawad and is hoping to plan a trip to Pakistan.
13. Grandpa, Amarjeet Kapoor, played by Rishi Kapoor admits to getting titillated while watching Mandakini singing and bathing under a waterfall in the movie, Ram Teri Ganga Maili (1985). The movie was directed by his father, Raj Kapoor, and the song was picturized on his actor brother, Rajiv Kapoor.
14. Grandfather Amarjeet Kapoor and his son, Harsh Kapoor, though share the same surname "Kapoor" in their real-life as well - Rishi Kapoor and Rajat Kapoor respectively, are both unrelated to each other.
15. Kal Ho Naa Ho (2003) In the Mr. Ooty Body Building League Competition, the song "It's The Time To Disco" plays.
16. Shahid Kapoor was offered the part of Rahul Kapoor but he declined, the part later went to Fawad Khan.
17. The scene where the whole family is getting a family photo to fulfill Grandpa's wish is partially copied/inspired by the family photo scene in the Final Episode of Modern Family season 1.