Kavya Singh (Alia Bhatt), who is set to be engaged to an NRI American doctor, Angad (Siddharth Shukla), decides to go to Delhi to buy an expensive designer bridal dress for her wedding, after her father, Kamaljeet (Ashutosh Rana) refuses to get her the pricey dress. She meets Rakesh "Humpty" Sharma (Varun Dhawan) in Delhi, who falls in love with her. Humpty, with the help of his friends, Shonty (Gaurav Pandey) and Poplu (Sahil Vaid), chases and harasses Kavya, but she’s not interested. She, however, befriends him. Kavya confides in Humpty, that her friend in Delhi, Gurpreet Sodhi (Guncha Narula), was blackmailed by her ex-boyfriend, who had secretly filmed a sex sequence of the two.

Humpty stumbles upon an idea for victimizing Gurpreet’s ex that would also avenge Gurpreet, and also gather the money for the wedding dress for Kavya. They manage to get some money but Kavya isn’t happy about the way that money is obtained. However, these ensuing adventures make Kavya fall for Humpty, and the night before she’s supposed to leave Delhi for her home in Ambala, Humpty and Kavya have sex. When Humpty asks her if she loves him, she says she won’t go against Kamaljeet's wishes. In order to help Humpty get the money for Kavya’s dress, his father and friends chip in. Kavya reluctantly accepts the money and leaves Delhi.

Kavya is a changed person when she arrives home. She tells her family that she has decided not to buy that expensive dress. In the meantime, she gifts a car to Humpty using that money, as she had known about Humpty's father’s dream for a car. Overwhelmed, Humpty and his friends go to Ambala, where he tries to win over Kavya. Kamaljeet believes firmly in arranged marriages against love marriages, as his elder daughter, Swati, married against his wishes and the marriage turned out to be a disaster ending in divorce. Kamaljeet instantly disapproves of Humpty, and gets him & his friends beaten up. Upon repeated persuasion, he gives Humpty a chance to find at least one reason why his daughter shouldn’t marry Angad. He sets him a five-day deadline to give him the reason. Humpty and his friends try their best to find flaws in Angad but fail to do so.

At the end of the deadline and on her wedding day, Kavya runs away from home and calls Humpty to join her on a train to leave the town. Kamaljeet and the rest of the family reach the train station, where Kamaljeet is extremely angry and hits Humpty. Humpty gives an emotional explanation saying that he may not be as rich, successful or good-looking as Angad, but he loves Kavya from the core of his heart. He leaves Ambala and heads back to Delhi after that incident. When Kavya is dressed up as a bride, Kamaljeet asks her if she still fancies that expensive wedding dress. She replies she’s not fit for expensive classy dress, but is suitable for local dresses. He gets the idea that her relationship would be fuller with Humpty, the local boy and not Angad, the American doctor. He brings everyone to Delhi where he approaches Humpty and gives his consent to marry his daughter.

• Varun Dhawan as Rakesh Sharma aka Humpty
• Alia Bhatt as Kavya Pratap Singh.
• Ashutosh Rana as Kavya's father, Mr. Singh.
• Siddharth Shukla as Angad.
• Aditya Sharma as Kavya's brother, Ranjeet.
• Deepika Amin as Kavya's mother, Mrs. Singh
• Mahnaz Damania as Kavya's sister, Swati.
• Gaurav Pandey as Shonty.
• Sahil Vaid as Poplu.
• Kenny Desai as Humpty's father, Mr. Sharma.
• Guncha Narula as Kavya's friend, Gurpreet.
• Shivani Mahajan as Humpty's teacher, Mrs. Chhibbar.

In August 2013, Dharma Productions confirmed that Varun Dhawan and Alia Bhatt would be portraying the main leads. This was the second time the pair will be seen together in a movie after Student of the Year. And it was also their second time working with the producer Karan Johar, who directed Student of the Year. Karan Johar in a press conference said that the movie is a tribute to the cult romantic classic Dilwale Dulhaniya Le Jayenge.

Filming took place in Mumbai with a second schedule completed on 12 March in Punjab.^[9] Filming took place in Vaseela in March 2014 with more planned for Ambala and Chandigarh.^[10] The filming was completed in Ambala, Chandigarh, Khan Market and Delhi University,^[11] at a budget of ?17.5 crore (US$2.6 million).^[12]

The song "Saturday Saturday" was filmed in Mumbai Film City recreating the Colosseum for a futuristic avatar song choreographed by Ahmed Khan.^[13]

The film's soundtrack is composed by Sachin-Jigar and Shaarib-Toshi with lyrics penned by Kumaar, Irshad Kamil and movie director Shashank Khaitan.^[2]

The song "Saturday Saturday" was the first single track released, which was originally composed by The Titans, Badshah and recreated by Sharib-Toshi. The song "Samjhawan" was originally taken from 2010 Punjabi film Virsa music done by Jawad Ahmed and sung by Rahat Fateh Ali Khan and Farah Anwar. The second single track "Mein Tenu Samjhawan Ki" is sung by actress Alia Bhatt while lyrics have been given by lyricist Kumaar. DJ Chetas composed The Humpty Mashup also known as Humpty Sharma Ki Dulhania Mashup.

Stardust Awards 2014

• Breakthrough Supporting Performance (Male) - Siddharth Shukla
• Best Actor (Romance / Comedy) - Varun Dhawan
• Best Actress (Romance/Comedy) - Alia Bhatt

7th Mirchi Music Awards

• Male Vocalist of The Year - Arijit Singh - "Samjhawan"
• Female Vocalist of The Year - Shreya Ghoshal - "Samjhawan"
• Song representing Sufi tradition - "Samjhawan"

In May 2016, it was announced that Khaitan will write and direct another romantic comedy under the Dharma Productions banner with Dhawan and Bhatt playing the lead roles.