Produced by Sandler's Happy Madison Productions in association with Relativity Media, Grown Ups was released in the United States on June 25, 2010, by Columbia Pictures.

In 1978, childhood friends Lenny Feder, Eric Lamonsoff, Kurt McKenzie, Marcus Higgins, and Rob Hilliard win their junior high basketball championship.

Thirty years later, in 2008, Lenny is a wealthy and successful Hollywood talent agent, married to fashion designer Roxanne, and has three children: Greg, Keith, and Becky.

Lenny rents a lake house in the same town for everyone to stay over Fourth of July weekend, though his family is leaving early to attend Roxanne's fashion show in Milan.

He pushes his boys to play outside and runs into his childhood opponent Dickie, who claims Lenny's foot was out of bounds when he made the winning shot and has been obsessed with getting a rematch to rectify the perceived 'mistake'.

As the friends spread Buzzer's ashes, Rob breaks down over his failed marriages and reveals that he has invited his estranged daughters Jasmine, Amber, and Bridget to visit.

Everyone visits Water Wizz where Marcus flirts with Jasmine and Amber after buying them skimpy bikinis, and Eric teaches Bean to drink cow's milk.

The families cause chaos throughout the park: the wives attract a bodybuilder, then jeer at his high-pitched Canadian accent; Rob assaults a slide attendant when he insults Bridget, and Eric ignores Donna's warning about a chemical in the pool that turns urine blue.

Everyone comes clean about the state of their lives: Roxanne confronts Lenny for canceling their flight to Milan before they left home, and he explains he wanted their family to have a normal vacation and to rein in his children's disrespectful attitudes; Deanne confronts Kurt for spending time with the Feders' nanny Rita, but Kurt retaliates by pointing out how she under-appreciates him; Eric reveals that he was laid off from his job, and was showing off the whole time so the others wouldn't humiliate him; Rob admits what everybody already knows – that he wears a toupee.

"[13] Rick Groen of The Globe and Mail criticized what he saw as blatant commercialism, saying the cast "lob[bed] gags they surely disdain at an audience they probably despise while reserving their own laughter for that off-camera dash all the way to the bank."

The main cast, including Adam Sandler, Kevin James, Chris Rock, David Spade, Salma Hayek, Maya Rudolph, Maria Bello and Steve Buscemi reprised their roles, except Rob Schneider.