When David Locking (Xavier Samuel) proposes to his girlfriend Mia Ramme (Laura Brent) a week after they meet in Australia, he rounds up his three best friends (Kris Marshall, Kevin Bishop, and Tim Draxl) to come to his wedding as best men. Soon, havoc ensues when the trio accidentally steal drugs, are chased by a mobster (Steve Le Marquand), and get the father-in-law's (Jonathan Biggins) sheep stoned.
Justine est une journaliste à la télévision, et sa rencontre avec Djalil, chirurgien provoquera un coup de foudre entre eux. Ce coup de foudre sera aussi source d'étincelles entre eux, et leur famille.
Bérengère et Vincent, tous deux issus de familles bourgeoises, s'unissent religieusement entourés des leurs. La journée, qui commençait plutôt bien, se dégrade au fil des heures. Le mariage est vécu d'un point de vue différent par certains membres de la famille des jeunes mariés et par les mariés eux-mêmes : secrets, rancœurs, malentendus et quiproquos se succèdent à l'ombre d'un très, très ancien secret… de famille.
Bittoo Sharma (Ranveer Singh) is street-smart and fun-loving. He gatecrashes a wedding for the free food, and Shruti Kakkar (Anushka Sharma), an intelligent and quirky girl who is assisting the wedding coordinator, confronts him. Bittoo pretends that he is part of the film crew and makes a video of Shruti's performance when he sees her dancing at the wedding. The next day, he tries to impress Shruti with a DVD he compiled of her dance at the wedding. Shruti is not interested in flirting, and reveals that her main interest is starting her own wedding planner business.
In 2002 Marni (Kristen Bell) is an acne-riddled high school sophomore at Ridgefield High School, with glasses and braces, making a video about how much she hates high school, and reveals how she is tormented and bullied by other children, specifically J-J (Odette Yustman), who made Marni's high school life miserable. She adds that her protective older brother, Will (James Wolk), was very popular as a handsome basketball player. However, at a very important basketball game, J-J pushes the mascot (Marni), who runs into Will, resulting in a loss of the game.
Sandeep 'Sandy' (Allu Arjun) is a next-gen youngster who parties hard and has a modern outlook but his idea towards marriage are traditional. As he gets a job in USA, his working parents (Suhasini and Ashish Vidyarthi), who got married against their respective parents' wishes, ask him to get married. He accepts and tells them that he will marry a girl of their choice in a ceremony that lasts 5 days. He also refuses to see his bride until the marriage. Everything is arranged according to his wishes, and his marriage is fixed with Deepthi (Bhanu Sri Mehra). At the ceremony, the bride is kidnapped by a local goon Diwakar (Arya).
Jean-Paul, qui vient de prendre sa retraite, est hypocondriaque. Son épouse, Anne, le trompe avec un de ses anciens collègues de bureau. Sa fille, Cathie, divorcée et maman d'un petit garçon âgé de cinq ans, vit avec Philippe, un jeune homme surnommé "Bac moins six" par Mathieu, le frère homosexuel de Cathie. Lorsque Jean-Paul découvre l'existence d'une tache sur sa hanche, apprend le second mariage de sa fille avec Philippe et que sa femme le trompe, la famille connaît une vraie zone de turbulences.
Amidst a Southern Utah Fundamentalist Church of Jesus Christ of Latter-Day Saints community, BeckyLyn (Wettig) is accused of murdering her polygamist husband. A fellow wife, Queenie (Leigh) is convinced of her friend's innocence and with BeckyLyn's son, Jordan (Czuchry) they work to clear his mother's name.
À Florence : Bea et Alessandro doivent se marier dans un mois, mais Bea doit partir pour un voyage d'affaires aux États-Unis, et donc différer le mariage. Mais les parents de Bea convainquent sa sœur aînée, Nana, d'organiser le mariage avec l'aide du beau-frère, en l'absence de Bea. Mais au retour de Bea, on découvre que la situation est plus compliquée qu'il n'y paraît, et le mariage est maintenant risqué.
Abigail Scanlon and Parker Wald are best friends since childhood who return to their small hometown of Lambert, Louisiana from New York City for a visit. After running into old friends, they learn that their close friend, Rachel, has lost the love of her life, Tony, to their ex-friend, Caitlin, a conniving gold-digger who pretends to be pregnant to trick Tony into marrying her. Intent upon preventing a loveless marriage, Parker and Abigail go "undercover" as Caitlin's bridesmaids to sabotage the wedding. Along the way, Caitlin's tightly-wound mother, Olivia, works hard to keep Abigail and Parker at bay as Parker falls for the town detective. The bridesmaids put their best-laid plans in motion only to see them go outrageously awry. As a result, the trio are arrested by Henry, but Parker convinces him to release them. So Abigail, Parker, and Rachel sneak into the wedding and kidnap Caitlin. They take her to the hospital for a pregnancy test and trick her into admitting the truth. At the wedding ceremony Tony lies to Caitlin that his family lost their fortunes which leads to her canceling the wedding and storming off. After Caitlin is gone, Tony gets on one knee and proposes to Rachel and reveals that he lied and that he is still rich.
Jane (Meryl Streep), who owns a successful bakery in Santa Barbara, California, and Jake Adler (Alec Baldwin), a successful attorney, divorced ten years earlier. They had three children together, two girls and a boy, who are grown. Jake, who was cheating on Jane, married the much younger Agness (Lake Bell).
Jane Nichols (Katherine Heigl) has been a bridesmaid for twenty-seven weddings. One night when she is attending two weddings almost simultaneously, she meets Kevin Doyle (James Marsden), who helps her home but disgusts her with his cynical views of marriage. He finds her day planner which she'd forgotten in the cab they shared. Meanwhile, Jane's sister Tess (Malin Åkerman) falls in love with Jane's boss George (Edward Burns) at first sight. Tess pretends to like the same things that George does so that she can get him to like her. Despite loving George herself, Jane does not reveal the truth and her sister's courtship progresses rapidly. Soon the new couple announces that they intend to marry in only three weeks and Jane becomes the wedding planner.