Four Christmases is a Christmas-themed romantic comedy film about a couple who go to see their divorced parents in one day.
It stars Vince Vaughn and Reese Witherspoon as a San Francisco, California, couple pressured into visiting all four of their divorced parents' homes on Christmas Day.
Orlando "Brad" McVie (Vince Vaughn) and his girlfriend, Kate (Reese Witherspoon) are a happily unmarried and childfree, upscale San Francisco couple whose respective households are somewhat similar - both bearing divorced parents, warring siblings with out-of-control kids and general awkward memories and simmering resentments from the past, which they find too embarrassing to share with each other.
In an effort to avoid these families at Christmas time, Brad and Kate pretend to be engaging in charitable work and escape to exotic sun-spots, such as Fiji, to enjoy a relaxing Christmas there.
Unfortunately, in the third Christmas of their relationship, Brad and Kate are trapped at San Francisco International Airport by a fogbank that cancels every outbound flight.
To make matters worse, they are caught on camera and then interviewed by a CBS 5 news crew, revealing their whereabouts to the whole city and, worst of all, their families.
With no escape, their lies foiled and no excuses to make, they find themselves unable to avoid a Christmas at home with their respective families. They first visit Brad's father (Robert Duvall), then Kate's mother (Mary Steenburgen), and then Brad's mother (Sissy Spacek) and, finally, Kate's father (Jon Voight), thereby celebrating four Christmases in one day.
As they brace themselves for a marathon of homecomings, Brad and Kate expect the worst, but are nevertheless unable to prepare themselves enough for what they get.
As the day progresses, each discover a new secret about each other that both had been too embarrassed to tell each other about, and soon find their relationship on the verge of collapse.
While Brad counts down the minutes to freedom, Kate finds herself looking at the lives of Brad's and her own siblings and realises that she does want a marriage and children of her own, the prospect of which frightens Brad. Eventually, in the final visit of the day, at Kate's father's house, Kate asks Brad to let her spend the visit on her own and claims to her family that they had split up.
Meanwhile, Brad spends some time at his own father's house with just his father and realises how empty his life is without a marriage and children, and that he loves Kate much too much to leave her.
He returns to her and they discuss the possibilities of having a child and getting married. The two then embark on their holiday in Fiji.
A year later on New Year's Day, the couple welcomes their first born child, a baby girl, which they have spent the last nine months hiding from their families. However, as their baby is the first born in the New Year, a news crew comes to congratulate them - once again revealing them, and their new baby to the whole city, and their families.
The film is produced by Spyglass Entertainment released by New Line Cinema on November 26, 2008, the day before Thanksgiving, and distributed by Warner Bros. Pictures. The film is director Seth Gordon's first studio feature film.