The coffee cups that the couple is holding when Tripp is talking to them about power vs. sail boats gives away one of the movie's shooting locations, New Orleans. CC's coffee houses are only found in Louisiana, at least as of 2006.
The minor league baseball game Trip takes Paula to is a home game of the New Orleans Zephyrs.
A loose remake of the French film Tanguy (2001), being solely based on its premise of a overgrown thirty-something child who does not want to leave home.
In its opening weekend, the film grossed a total of $24.6 million, ranking first in the United States box office results for that weekend.
The film grossed a total of around $90 million in the United States box office and made $128,406,887 worldwide.
Towards the end of the movie we find out that Justin Bartha's character, Ace, bought his house from his parents to avoid having to pay the inheritance tax when they pass away. The Federal inheritance tax during the year this movie was released was on inheritances starting at $2 million. There are state inheritance taxes as well, but Maryland, where this movie is supposed to take place, exempts direct descendants of those receiving the inheritance from the tax.