Raj (Salman Khan) is a singer trying to make his way in the big city of Mumbai. He rescues a young woman who has fallen in front of a train and stays with her when she is rushed to a hospital. Pooja Oberoi (Rani Mukerji), the daughter of a wealthy family, survives but falls into a coma. Her family rushes to the hospital and, finding Raj there, assumes that he is Pooja's husband, Romi, with whom she had eloped and whom they had never met. Pooja cannot correct them; Raj, who can, prefers not to out of kindness.
Shashi Godbole (Sridevi) is a housewife who makes and sells laddoos as a home-run business. Her husband Satish, (Adil Hussain) and daughter, Sapna (Navika Kotia) take her for granted, mock her poor English skills and generally treat her with disrespect, making Shashi feel negative and insecure. However, her young son, Sagar (Shivansh Kotia) loves her as she is, and her mother-in-law (Sulabha Deshpande) offers her words of sympathy.
A young, struggling British filmmaker Sue McKinley (Alice Patten) comes across the diary of her grandfather, Mr. McKinley (Steven Mackintosh), who served as a jailer in the Imperial Police during the Indian independence movement. Through the diary, she learns about the story of five freedom fighters who were active in the movement: Chandrasekhar Azad, Bhagat Singh, Shivaram Rajguru, Ashfaqulla Khan, and Ram Prasad Bismil. McKinley, in his diary, states that he had met two type of people in his life: the first one... who died without uttering a sound and the second kind ... who died with lots of anguish.. crying over their deaths... McKinley reveals that it was then that he met with the third kind.
In 1995, during the Kashmir conflict, Hilaal Meer, a doctor, agrees to perform an appendectomy on the leader of a pro-separatist group. To avoid detection, he performs the surgery at his house, much to the chagrin of his wife Ghazala, who questions his allegiance. The following day, during a military raid, Hilaal is accused of harbouring terrorists. A shootout ensues at his home, during which the leader of the separatist group is killed and Hilaal is taken away for questioning. The doctor's house is bombed subsequently to kill any other militant hiding inside. Several days later, Hilaal and Ghazala's son, Haider, returns from his university to seek answers about his father's disappearance. Upon arrival, he is shocked to find his mother singing and laughing along with her brother-in-law, Khurram. Unable to understand his mother's behaviour, he begins searching for his father in various police stations and detention camps with the help of his fiancee Arshia, a journalist.
The story begins an airport, when Jignesh a.k.a. Jiggy(Nirav Mehta), Ravindran a.k.a. Rotlu(Karan Makhija), Sandhya a.k.a. Bombs(Alishka Varde) and Shaleen(Sugandha Garg) offer to tell Mala(Renuka Kunzru), Jiggy's friend & crush, the tale of Jai and Aditi, a love story with joys and sorrows, happiness and heartbreaks, laughter, songs and fights, and...a climax at the airport. Mala is initially uninterested in the story, and hates loves stories in general, but still agrees to listen as the flight carrying the friends they have come to receive is late.
Siddharth "Sid" Mehra (Ranbir Kapoor) is the carefree son of wealthy businessman Ram Mehra (Anupam Kher). A resident of Mumbai, Sid's only interest is to have fun and spend his father's money. Thus, he spends little time at college and is not prepared for final exams. A day after the final exams, Sid's father tells him it is time to join his company, Flower Showers - a bathroom furnishings manufacturer - for 30 days, which Sid reluctantly does only after his father tempts him with the promise of a new car.
Laila (Divya Bharti), brought up in a brothel, is a cabaret dancer in Digvijay Singh's (Kabir Bedi) five-star hotel. One day, Laila receives a phone call from her mother who is just about to die and tells her a shocking news that she was not her real mother, and that Laila was an adopted child.
Rahul (Shahrukh Khan) and Nisha (Karisma Kapoor) are members of a massive dance troupe. They are the best of friends, although Nisha is secretly in love with Rahul. Rahul announces his desire to direct a musical named Maya. The members of the troupe, including Nisha, have their doubts about the title character when Rahul describes "Maya" as a girl who believes in true love and waits for her prince charming who will surely turn up and take her away.Meanwhile, Pooja (Madhuri Dixit) also has a passion for dancing. Having been orphaned at a young age, she has been raised by close friends of her parents.
Dushant (played by Khan), Jaya (Tandon), Sujit (Behl) and Nisha (Nishan) are childhood friends. Dushant aspires to become a successful singer but has little money. Jaya helps him to realize his ambitions. As Dushant achieves success, a rift is created between the two of them. Sujit and Nisha take undue advantage of this to get close to Dushant and create a misunderstanding between him and Jaya. Kamlesh Dhingra (Avtaar Gill), Nisha's father, approaches Dushant for financial assistance for his business venture but is turned down by Rajpal (Kiran Kumar), Dushant's mentor. Dhingra and Sujit plot to amass Dushant's wealth by luring Dushant to marry Nisha and getting rid of Rajpal. Dushant learns of this plot. When Sujit is murdered, Rahul (Amit Kumar), a police officer, comes to investigate the murder. Nisha is also murdered under mysterious circumstances and the climax builds when Dhingra is also killed.
This is a story about an architect Raj Malhotra (Shahid Kapoor). While he was a top student in his school and college days, he is not having much luck in finding work, clients or projects. All he does, seems to go wrong. Raj goes to a gypsy named Haseena Bano Jaan (Juhi Chawla). She advises him that his luck is not good and he needs a lucky charm or a person who can change his life. Afterwards, Raj meets Priya (Vidya Balan), who is ready to help the citizens of a community by trying to save a community center. Although they do not get along at first, Raj eventually realizes that Priya is his lucky charm. Priya ends up helping Raj through sticky situations and Raj eventually figures out that she is, in fact, changing his life. Knowing this, Raj lies to Priya by telling her that he will help her save the community center, but instead, he is trying to build a shopping mall there so he can finally be recognized as an architect. He also falls in love with Priya and she too falls for him. However, when Priya finds out the truth about what Raj is trying to do, she becomes very upset and hurt. To make up for his lie, Raj sells everything he has, not caring about his job. He proposes a plan to save the community center and ends up winning Priya's love and admiration. After Priya and Raj finally get together, Raj's life changes and he becomes prosperous.
Anu Malhotra and Siddharth Mishra (Sidhu) are in love with each other and would like to get married. Anu is ready to inform her parents about her future life-partner, but everything is put on hold, as the family decides to go out on a group safari-like expedition. Siddharth decides to go incognito also. The group gets to view wildlife from fairly close distances. Tragedy strikes when the group (except Sidhu) is kidnapped by the Bandit Durga Narayan Choudhary and his gang. The bandits commit atrocities on the kidnapped people and finally behead one of the women in order to terrorize the government and extract ransom as well as release of one of their men who is in police custody. Once their demands are met, the bandits release remaining hostages, except Anu, whom the chief Durga Narayan Choudhary has started liking. This is unacceptable by his girlfriend Bali, the only female bandit of the gang. When Sidhu not find Anu among the released hostages, he sends the illegal arms supplier Dorai to request Durga Narayan Choudhary for Anu's release. He secretly follows Dorai and finally reaches Anu. In the ensuing commotion, he is able to run away with her, with the bandits in their pursuit. They keep searching their way out of the dense forest. Meanwhile the goons started to reduce in numbers as they get shot one by one during repeated police encounters. Finally, Durga is the only one left. Still mad about Anu, he searches for her. He is about to take Anu away once more but is intercepted by Commander Shivraj, whom he eventually murders, but finally Sidhu kills Durga and re-unites with Anu and the movie ends on a happy note.
Billu (Irrfan Khan) is a poor barber who lives with his wife Bindiya (Lara Dutta) and their two children, Gunja (Mitali Mayakar) and Ronak (Pratik Dalvi) in the village of Budbuda. He also spends time with his close friends Budbudiya (Rajpal Yadav) and Naubat Chacha (Asrani). Though struggling, Billu lives an uneventful life until Bollywood superstar Sahir Khan (Shahrukh Khan) comes to the village for a film shoot.
Bablu Chaudhary (Shah Rukh Khan), a bubbly young man, is an aspiring chef. He gets a job as the lead chef at a hotel and meets the charming Sonia Kapoor (Juhi Chawla), the hotel manager. They bond and Bablu falls in love with her. Meanwhile, Manu, (Shah Rukh Khan in a double role), Bablu's lookalike, is a ruthless criminal who has escaped from jail to kill his partners, who have betrayed him. One day, when Bablu takes Sonia out for lunch, he gets arrested because the police think that Bablu is Manu. Bablu is able to prove his true identity but not before Manu hears of his duplicate and decides to take his place by killing him. There is a lot of confusion about who is who by all associated with the two men, including Sonia, Bablu's mother Bebe (Farida Jalal), and Manu's girlfriend, Lily (Sonali Bendre). In a final confrontation between Manu and Bablu, Lily shoots Manu dead after realizing he is not good at heart and does not truly love her like Bablu loves Sonia.
A scientist named Dr. Sanjay Mehra (director Rakesh Roshan) creates a computer program from which he sends variations of the syllable om into space, hoping to attract the attention of extraterrestrial life. When he believes he has finally gotten a response, the scientific community mocks him. While driving home, an alien spacecraft appears overhead. Dr. Mehra veers off the road, causing the car to hit a stone, flip over, and explode. Dr. Mehra dies, but his wife survives the wreck and returns home to India. When their son Rohit (Hrithik Roshan) is born, he is mentally disabled. His mother raises him in the town of Kasauli, where he grows up to be a man of limited intellect and childish personality, but with a loving and emotional heart. Rohit has a number of much younger friends: loyal children who play with him.