Ok Jaanu

Aditya "Adi" Gunjal (Aditya Roy Kapur) comes to Mumbai to work for a gaming company owned by Prahlad Kakkar, aspiring to make it big in the United States as a video game developer. At Mumbai railway station, he spots a girl (Shraddha Kapoor) on the adjacent platform trying to jump in front of an approaching train. A horrified Adi gives her a shout. The girl then disappears.

Adi moves into the house of Gopi Srivastava (Naseeruddin Shah), his elder brother's senior, a strict, retired High Court judge living with his wife Charu (Leela Samson). Charu is a renowned Hindustani classical singer who suffers from stage two Alzheimer's disease. On his first day at work, Adi is encouraged by his friend Bantee to pitch the idea of his game "Mumbai 2.0," to his boss. Adi impresses his boss and gets a deadline of five months to prepare a prototype to be sent to Los Angeles for a competition.

Later, while at his friend Jenny's wedding, Adi spots the girl from the station. The girl introduces herself as Tara. Adi learns that Tara is planning to pursue architectural studies in Paris and he says that he dreams of becoming a big shot like Mark Zuckerberg. Adi and Tara strike a chord over their mutual presumptions on dysfunctionality of the institution of marriage. Tara also reveals that her antic at the railway station was a ploy to get rid of her ex-boyfriend who desired to marry her. Subsequently, they hang out, exploring the city.

The next day, Adi pursues Tara to Ahmedabad on her work trip. Tara takes Adi to Sabarmati Ashram which she used to visit with her father, as a kid. She discloses that her decision to never marry was incited by her parent's broken marriage. Adi and Tara decide to live-in with each other before they go their separate ways for their respective careers. The two approach Gopi and Charu with their wish. Gopi initially strongly disagrees with their wish, but then decides to give in when Tara impresses Charu with her classical singing ability.

Adi's family plans to give Adi a surprise visit and his sister-in-law finds out that he is living-in with Tara, which his brother would adamantly be opposed to. She asks Tara to ponder their future, when Tara at some point would have to pick between her love and her career. Tara and Adi continue living happily, getting a thrill out of their mutual endearing camaraderie and growing affinity and attachment.

Tara's admission to the institute at Paris gets approved. Tara informs Gopi of this and also confides in him that it might now be hard for her to leave Adi and go so far away. The next day, Tara goes to Jaipur for a work trip, and Adi starts to miss her profoundly. Adi gets summoned to Kanpur by Tara's affluent mother, who wishes to know his intentions for her daughter. As a result, Tara finds Adi missing when she returns from Jaipur and searches for him miserably, realizing that living without him would make her forlorn.

Tara and Adi begin to understand the importance of each other's presence in their life, especially after seeing the love and patience Gopi has for his ailing wife, who one day goes missing as she bewilderingly forgets the way to her own house and is found by Tara and Adi sitting on a temple platform in heavy rain.

Tara's mother visits Adi's family to discuss a marriage, infuriating Tara. Later in the day, Adi's game, "Mumbai 2.0" gets selected for the competition in Los Angeles, meaning that he has to leave for the United States soon. He confides in Jenny that it'd be hard for him to leave Tara. Tara, too, seems visibly vexed. The next day, Adi and Tara make a pact to enjoy themselves to the fullest for the next ten days after which they will eventually go their separate ways.

One day, Charu goes missing again. While looking for her, they start bickering about their relationship. However, after finding Charu and bringing her home back to her husband, Adi finally proposes marriage to Tara before they leave for their respective destinations. They get married in Gopi's house among close friends and family.

Post marriage, both continue to accomplish their own dreams, one in Paris and the other in Los Angeles, keeping in touch and waiting for the day they can be together again.

{ An end credits roll plays the rest of their story in animation, with them finally living together one day and starting a family. }

• Aditya Roy Kapur as Aditya "Adi" Gunjal
• Shraddha Kapoor as Tara Agnihotri (Few lines as Mona Ghosh Shetty)
• Naseeruddin Shah as Gopi Srivastava[6]
• Leela Samson as Charu Srivastava[6]
• Jasmeet Singh Bhatia as Bantu[6]
• Eesh Kakkar as Tara's ex boyfriend
• Kitu Gidwani as Tara's Mother
• Sanjay Gurbaxani as Deputy Commissioner of Police
• Sarika Singh as Adi's Sister in Law
• Sharma Vibhoutee as Jennifer
• Vijayant Kohli as Ravi Gunjal (Adi's Brother)
• Prahlad Kakkar as Adi's boss
• Boloram Das as security guard

The film score and soundtrack are composed by A. R. Rahman while the lyrics for songs are written by Gulzar. Rahman re-used most of his compositions from the Tamil soundtrack of O Kadhal Kanmani, with the exception of three songs. He composed two new songs for the film which are the Hindi counterparts of "Aye Sinamika" and "Malargal Kaetten" that were part of Tamil version. The Hindi counterpart of "Parandhu Sella Vaa" is a cover version of Rahman's yesteryear classic "Humma Humma" from Ratnam's 1995 Tamil film Bombay. Dubbed as "The Humma Song", the cover was done by Badshah and Tanishk Bagchi.[6] The full soundtrack was released by Sony Music India on 4 January 2017.

The film grossed an estimated ₹410 million (US$5.7 million) worldwide, with approximately ₹328 million (US$4.6 million) earned domestically, and ₹82.1 million (US$1.2 million) from international releases.[7]

Bollywood Hungama rated the film 2.5 out of 5 stars, stating that it is "a decent love story which works only in parts mainly because of the chemistry between Aditya Roy Kapur and Shraddha Kapoor."[8]

Writing for Hindustan Times, Anupama Chopra rated the film 2 out of 5, commenting, "This is just a pointless film, because an exact frame-for-frame version already exists in Tamil", referring to O Kadhal Kanmani, directed by Mani Ratnam. Chopra described Kapur and Kapoor as "too lightweight" to bring a comparable depth to the characters that the original actors did.[9]

• Ok Jaanu at IMDb 
• Official website
• Ok Jaanu at Bollywood Hungama