Ranbir Kapoor took 6-7 weeks to get into each character for Sanju. He worked out, grew his hair and even starved himself for the film.
While preparing for his role in Sanju, Ranbir Kapoor felt that the hardest challenge was to identify the inner struggles of Sanjay Dutt and portray it on screen rather than getting the looks right.
To prepare for the role in Rockstar, Ranbir Kapoor lived with a Jat family in Pitampura and studied their mannerisms.
After retirement from movies, Ranbir Kapoor wishes to become a football coach.
Ranbir Kapoor is the first boy from the Kapoor family to complete college.
Ranbir Kapoor is a trained Jazz and Ballet dancer, knows horse riding, and also learnt to play guitar for his role in the movie Rockstar.
Ranbir Kapoor is named after his grandfather Raj Kapoor, whose original name was Ranbir. Also, Ranbir Kapoor's middle name is Raj.
While travelling in a car, Ranbir Kapoor has the habit of adding up the digits on the number plate of every vehicle passing on the road.
Apart from acting, Ranbir Kapoor is very good at mimicking Shah Rukh Khan, Hrithik Roshan and Sanjay Dutt.
Ranbir Kapoor usually prefers to wear mismatched socks.
In 2010, Ranbir Kapoor was voted the "Sexiest Asian Man" in a poll conducted by the magazine Eastern Eye.
The main reason why Ranbir Kapoor joined the film industry was because he wanted to feature in a Pepsi Advertisement.
Ranbir Kapoor once happened to drink his father's after shave by mistake and had to be immediately rushed to a hospital to get his stomach pumped.
Ranbir Kapoor got his ear pierced for the movie Yeh Jawaani Hai Deewani (2013).
Actor Ranbir Kapoor went on a house arrest while shooting for the movie Rocket Singh: Salesman of the Year because he did not want to reveal his look for the movie.
Ranbir Kapoor claims that actor Imran Khan's wife Avantika Malik was his teenage crush.
Ranbir Kapoor claims that his mother cut his nails right until he left his parents' bungalow.
Ranbir Kapoor has a deviated septum, which he got from falling onto the toilet pot as a child. This is why he sports a cut on his right cheek and breathes from his mouth, causing him to talk and eat extremely fast.
Although he watches a lot of his father Rishi Kapoor's films, Ranbir Kapoor admits to feeling too 'shy' to watch his mother's films as he's uncomfortable with the idea of people judging her by her work on-screen.
Ranbir Kapoor admits to being a candy crush addict.
Niddhi Agerwal is a self-confessed fan of Ranbir Kapoor and Leonardo DiCaprio, and hopes to work with them some day.
While Alia Bhatt also pitched her suggestion for the movie's title, it was Ranbir Kapoor who suggested the title of Imtiaz Ali's Jab Harry Met Sejal, with little help from Karan Johar who suggested to add 'Jab' in the title. Shah Rukh Khan then rewarded Ranbir with INR 5000.
In early 2016, Ranbir Kapoor co-founded a production house, Picture Shuru Productions.
Ranbir Kapoor is the proud co-owner of Indian Super League football team Mumbai City FC and a brand ambassador for Spanish football club FC Barcelona.
Ranbir Kapoor is the vice captain of All-Stars FC, a football team that comprises of celebrities, who play football games for charity. The side, captained by Abhishek Bachchan, also comprises of stars like Arjun Kapoor, Aditya Roy Kapoor, and Dino Morea.
Ranbir Kapoor has actually said that one of the main reasons he wanted to become an actor was to be in a Pepsi commercial. The Bollywood star has also endorsed other top brands like Lenovo, Tata Docomo, Nissan, John Players, Renault, Philips, Askme.com, and Lays.
Ranbir Kapoor has often been cited as the sole reason behind Katrina Kaif and Salman Khan's breakup.
After the release of her debut movie, Rockstar, Nargis was allegedly dating her co-star, Ranbir Kapoor. However, both of them rubbished the rumors, putting an end to the speculations.
In 2009, a year after they began dating, Ranbir Kapoor and Deepika Padukone ended their relationship. Although Ranbir initially claimed that the break-up was mutual, he later admitted to infidelity. When asked about this in an interview, the actor said, "Yes, I have, out of immaturity, out of inexperience, out of taking advantage of certain temptations, out of callousness." The two are, however, on good terms and continue to share a friendly and professional relationship.