At the 1998 Oscar ceremony, when his name was announced as the winner of the Best Actor award, Jack Nicholson ascended to the podium by carefully stepping over the cracks between the tiles on the stage, in imitation of his character, Melvin Udall. Nicholson dedicated his Oscar to his A Few Good Men co-star J.T. Walsh who had died shortly before the Academy Awards in 1998.
In one scene the dog starts mimicking Jack Nicholson by stepping over the cracks in the sidewalk. The filmmakers accomplished this by placing little obstacles on the cracks so that the dog had to step over them. They then removed the obstacles digitally in post-production.
An earlier version of the script was called "Old Friends". It was listed as one of the best unproduced screenplays by Movieline magazine and had Kevin Kline and Mike Newell attached at one point to star in and direct it, respectively.
At the end of this film, when the credits begin to roll, the song "Always Look on the Bright Side of Life" performed for this film by Art Garfunkel, begins to play. Jack Nicholson and Art Garfunkel starred together in the film, Carnal Knowledge.