O Heart, It Is Difficult) is a 2016 Indian Hindi-language musical romantic drama film directed, produced and written by Karan Johar under his banner Dharma Productions.

[3] The film's soundtrack composed by Pritam was an instant blockbuster, thus enhancing its hype, with lyrics written by Amitabh Bhattacharya and songs sung by Arijit Singh.

At the 62nd Filmfare Awards, Ae Dil Hai Mushkil received a leading 9 nominations (tying with Udta Punjab) for Best Director (Johar), Best Actress (Sharma) and Best Actor (Kapoor), and won 4 awards, including Best Music Director (Pritam), Best Lyricist (Bhattacharya for "Channa Mereya") and Best Male Playback Singer (Arijit Singh for "Ae Dil Hai Mushkil").

Later, when they discover their respective partners are cheating on them, they break up with their lovers: Ayan with Lisa D'Souza and Alizeh with "Dr." Faisal Khan, and the two go to Paris to spend a week together.

Partially confused, but still in love with him, Alizeh decides to go with DJ Ali, and so unintentionally stops hanging out with Ayan and they cease communication.

At the airport to board a flight to Dubai, he meets Saba Taliyar Khan, an older woman and poet, who is leaving for Vienna.

He begins to send pictures of Saba to her to try and induce jealousy while Alizeh tells him about her happy life with Ali and assumes that he has moved on.

The screen blacks out and comes back to the present where Ayan, still a popular singer, is giving an interview based on the love of his life.

[6] Fawad Khan, who had recently appeared in Johar-produced Kapoor & Sons (2016), was cast to play the role of a DJ, described as "not exactly a cameo as it becomes a backbone for a certain conflict of a character" in the film.

[14] On 8 October 2016, the Indian political party, Maharashtra Navnirman Sena (MNS), proclaimed that they would not allow the release of the film, following nationwide protests surrounding the terrorist attack in Jammu and Kashmir on 18 September 2016 and the decision by Cinema Owners Exhibitors Association of India preventing the release of films with Pakistani actors in four states – Maharashtra, Gujarat, Karnataka, and Goa.

Announcing that security will be tightened at theaters along with sufficient police protection, Maharashtra chief minister, Devendra Fadnavis, commented on the issue, saying, "Anyone found taking the law into their hands will be dealt with firmly."

But with that same energy, I beseech you to know one thing – that over 300 people in my Indian crew have put their blood, sweat, and tears into making my film, Ae Dil Hai Mushkil.

On 20 October 2016, Mukesh Bhatt said that his discussion with the Union home minister, Rajnath Singh, had been consequential, and affirmed that the film will be screened throughout the country without any violence.

[17] Ae Dil Hai Mushkil was made on a total budget of over ₹50 crore, including marketing and distribution costs.

Moreover, the film now ranks as the highest-earner for Rai Bachchan, beating Dhoom 2's ₹82.30 crore ($12.3 million) in 2006; the fourth biggest for Sharma as well as for Kapoor.

[28] In the United Kingdom, it recorded the biggest Bollywood opening of the year with ₹4.88 crore ($772,891), debuting at eighth place at the U.K. box office.

[29] In the United States and Canada, the film received a limited release across 302 theaters and grossed ₹14 crore ($2.13 million) in its opening weekend finishing in tenth place.

[32] Bollywood Hungama gave 4/5 ratings and commented, "a contemporary and a progressive take on relationships from the master storyteller Karan Johar".

"[34] and, "As evident by his body of work, Karan Johar has a sweet spot for this attribute, in the splendidly romantic and richly satisfying Ae Dil Hai Mushkil.

[36] Rajeev Masand of News 18 gave the film 3.5 out of 5 stars and said, "Despite the occasionally mawkish undertones and the blatant attempt at emotional manipulation in its final act, Ae Dil Hai Mushkil gives you a hero that makes you care.

"[37] Subhash K. Jha of Deccan Chronicle rated 2.5/5 and said, "Ae Dil Hai Mushkil is one good looking film with actors who epitomize human beauty.

"[38] Sweta Kaushal of Hindustan Times rated 2.5/5, saying "Ae Dil Hai Mushkil offers little in terms of story and fails to get the audience empathize or feel for the characters and events in the movie.

"[40] Mike McCahill of The Guardian rated 2/5 and said, "Despite controversy over the casting, Karan Johar's romance has a failure of nerve about Hindu-Muslim relations.

"[41] The Hindu commented, "Ae Dil Hai Mushkil is the latest in the brand of cinema that isn't so much as plot driven as it is focused on characters, relationships, and interactions.