Yeh Jawaani Hai Deewani was produced by Hiroo Yash Johar and Karan Johar under the banner of Dharma Productions.

It was co-produced by Apoorva Mehta and UTV Motion Pictures and written by Hussain Dalal based on a story by Ayan Mukherjee.

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Kabir and Naina bond during a trekking trip. Before Naina can express herself, Kabir leaves India to pursue his career. They meet again years later, but he still cherishes his dreams more than bonds.

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Ranbir Kapoor as Kabir 'Bunny' Thapar, a travel-lover who doesn't take love seriously until he falls for Naina.

Deepika Padukone as Naina Talwar, a nerdy topper who falls for Bunny.

Aditya Roy Kapur as Avinash 'Avi' Arora, a fun and flirtatious guy with always a drink in his hand. He is Bunny & Aditi's best friend.

Kalki Koechlin as Aditi Mehra, a tomboy and childish girl but matured by time, Aditi is close friends with Naina and best friends with Avi and Bunny. She gets married to Taran.

Kunaal Roy Kapur as Taran, Aditi's husband who is awkward, weird and strange but good at heart.

Evelyn Sharma as Lara, a ditzy bimbo, who consistently flirts with Bunny. She is a cousin of Taran.

Farooq Sheikh as Bunny's father, who instilled moral values in Bunny, which Bunny remembers even after his death.

Tanvi Azmi as Bunny's step-mother. Bunny hates her and her sharbat, but she loves him dearly like her own child and encourages him to accept his love for Naina.

Dolly Ahluwalia as Naina's mother. She doesn't like Aditi initially.

Poorna Jagannathan in an guest appearance as Riana, a co-host and a close friend of Bunny. She offers Bunny his dream job, that of a travel show host.

Madhuri Dixit-Nene as Mohini. Dancer for the song "Ghagra".

Rana Daggubati in a cameo appearance as Vikram, a photographer at Aditi's wedding. He likes Naina and flirts with her by sending her messages with lyrics of Bollywood romantic songs.Naveen Kaushik as Sumer, trek guide for the Manali tripUmar Yadav as Nanoo, one of fellow campers on the Manali trip

Omar Khan as Dev

Anisa Butt as Preeti, Lara's Friend.
Mayank Saxena