Many lines in the film were improvised. The writers did constant rewrites and came up with ideas during filming but had to stop because of the 2007 Writers Guild strike.
The logo for Sturdy Wings is virtually identical to the image on the cover of "Wingspan: Hits and History" by Paul McCartney's band, Wings.
Paul McCartney impersonator Joey Curatolo provides the vocal for the fictional Denny Laine song 'Love Take Me Down to the Streets', which we hear during the closing credits.
Before Danny proposes, Wheeler tells him that they have to be at Blue Valley Middle School. Blue Valley is the name of the actual middle school that Paul Rudd attended in Overland Park, Kansas.