What's the name of this movie (European and American movies)

John Buckway (owen wilson) and Jeremy Gray (Vince Vaughn) are not only working partners, but also enjoy the same hobby-attending weddings! No matter who holds the wedding, no matter what form the wedding reception is, from Jews, Italians, Irish, Indians to China, these two stooges can always blend in and make up a moving story to tell the guests present, which becomes the focus of the wedding reception. At the same time, they also seduced single women (especially bridesmaids) who were moved by the wedding, and they succeeded repeatedly. However, after the wedding, they will disappear without a trace, which is the rule of "wedding guests".

Coincidentally, Jeremy learned that the daughter of Treasury Secretary William Cleary (played by christopher walken) was about to get married, which would be the most important event in the Washington social circle this year. Celebrities from all walks of life will gather here, and of course, John and Jeremy who love to join in the fun. After subtly sneaking into this luxurious party, they immediately begin to target the bridesmaids Claire (Rachel McAdams) and Gloria (Ella Foucher).

At the reception, Jeremy began to seduce Gloria. Gradually, John found himself in love with this beautiful and frank bridesmaid, so he persuaded Jeremy, who had been entangled in Gloria, to give up the rule of "wedding guests" and accepted the invitation to the weekend party, and followed Claire to the Clary family manor. After living in this luxurious manor, John and Jeremy not only have to endure the hysterical and bizarre family members of the Clary family and make many jokes, but also learn a valuable lesson about love and affection.