• Producer : Vineet Jain
• Director : Harshavardhan Kulkarni
• Writer : Suman Adhikary , Akshat Ghildhial , Harshavardhan Kulkarni
• Screenwriter- screenplay : Suman Adhikary , Akshat Ghildhial , Harshavardhan Kulkarni
• Dialog Writer : Suman Adhikary , Akshat Ghildhial , Harshavardhan Kulkarni
• Story : Suman Adhikary , Akshat Ghildhial
• Cinematography- Camera Man : Harshavardhan Kulkarni
• Editor : Harshavardhan Kulkarni
• Composer : Tanishk Bagchi , Amit Trivedi , Khamosh Shah
• Lyricist : Vayu , Varun Grover , Anvita Dutt , Anurag Bhomia , Azeem Shirazi

• Actor : Rajkummar Rao
• Actress : Bhumi Pednekar

Shardul is a police officer whose widowed mother worries about his marriage. On the other hand, Sumi is a physical education teacher who meets a person on a lesbian dating app. The person from the app requests Sumi to meet her in a cafe for which she agrees. On reaching the cafe, Sumi realizes that she was chatting with a boy all these days. Afraid Sumi leaves the place but the boy continues following her and keeps on threatening her about her sexual orientation. Fed up with his blackmails Sumi reports it to Shardul who works in a women's police station. Shardul meets Sumi and tells her that the boy from the dating app has been warned. He immediately asks Sumi to marry him, saying that he is gay himself. He wants to marry her only to get free from their family's pressure on them to get married. Sumi accepts the deal and they both get married. They go on a honeymoon where Shardul introduces his boyfriend Kabir to Sumi. She feels happy seeing both of them having a good bond. After returning from the trip, Shardul and Sumi move into a police quarter. Later, Sumi gets to know Rimjhim who works in a hospital. They go out on a date, where Rimjhim opens up about being rejected by her family for being a lesbian. They start a relationship immediately after, and eventually fall for each other. Eventually, Rimjhim moves into Sumi's room. When Shardul's superior's wife questions them about Rimjhim they brush off it saying that she is their cousin. Meanwhile, Shardul gets to know that Kabir is just passing time with him and is not really in love with him. He feels devastated and days pass when he finally finds Guru Narayan, a queer South Indian lawyer (his exact sexuality is left ambiguous and up for interpretation throughout the movie). He immediately takes a liking to Shardul while the latter is controlling the mob during a gay pride parade. They both like each other and start dating shortly after, post a period of casual flirtation. Later, Shardul and Sumi go to Shardul's home for a festival. When questioned about her not being pregnant yet, Shardul tells them that Sumi has some problem with her reproductive tract. They go to a checkup but the result turns out to be normal. Shardul's mother moves into their quarters to make sure that they have a physical relationship. While talking about this, Sumi tells her mother-in-law that Shardul is not fit to be a father. Listening to this, Shardul's and Sumi's family advises them to adopt a baby for which Sumi feels so happy as that was her dream. Done with her work, Shardul's mother leaves for her home but returns back as she misses the train only to see Sumi and Rimjhim being intimate. She tells this to both the families and knowing this, Shardul asks Sumi to not reveal his sexual identity. Sumi's family admonishes her for being that way while Shardul's family is furious with Sumi for being a lesbian. Shardul then confesses to his family that he is gay in a show of solidarity. His mother accepts the fact which Shardul shares with Sumi with great joy. Sumi and Shardul decide to get divorced but Shardul receives a message stating that their adoption plea is accepted and conveys the same to Sumi. They slip off the idea of getting divorced and decides to adopt a baby and lead a life in the way they wanted, thus reclaiming lavender marriages. One year later, Shardul and Sumi adopt a baby and perform an adoption ritual in which Rimjhim too participates as Sumi and Rimjhim are going to be the parents of the baby. Shardul's superior and his wife visit their home for the ritual seeing which Rimjhim leaves Sumi's side. Seeing this, Sumi's father tells Rimjhim to continue the ritual stating that the ritual needs the mother's presence. Shardul too invites Guru Narayan to accompany him in the ritual. The superior remains confused seeing this, but the four smile vibrantly.

• Track 1 : Badhaai Do - Title Track ( बधाई दो - टाइटल ट्रैक )
• Track 2 : Atak Gaya ( अटक गया )
• Track 3 : Atak Gaya(Acoustic) ( अटक गया (ध्वनिक) )
• Track 4 : Hum Thay Seedhe Saadhe ( हम थे सीधे साधे )
• Track 5 : Hum Thay Seedhe Saadhe(Female Version) ( हम थे सीधे साधे (महिला संस्करण) )
• Track 6 : Gol Gappa ( गोल गप्पे )
• Track 7 : Bandi Tot ( बंदी तोता )
• Track 8 : Hum Rang Hai ( हम रंग है )
• Track 9 : Hum Thay Seedhe Saadhe ( हम थे सीधे साधे )
• Track 10 : Maange Manzooriyan(Female Version) ( मांगे मंजूरियां (महिला संस्करण) )
• Track 11 : Maange Manzooriyan(Male Version) ( मांगे मंजूरियां (पुरुष संस्करण) )
• Track 12 : Atak Gaya(Abhijeet Version) ( अटक गया (अभिजीत संस्करण) )