I Am Legend

Will Smith grew so enamored of his canine co-star, Abbey, that he tried to adopt her when filming was finished, but the dog's trainer could not be persuaded to give her up.

Neville states the lab doors are made of Plexiglas (acrylic), but when Alpha Male smashes them, the sound is that of breaking glass.

The title doesn't appear on screen until several minutes into the film.

The ending to the Alternate Theatrical Version varies from the original ending. Instead of blowing himself and the hemocytes up with a grenade, Neville discovers that the hemocytes actually came for the female he captured earlier in the movie. He relieves her of the cure and returns her to the hemocytes. Afterwards, the hemocytes leave and let Neville, Anna, and Ethan be. The three then are seen leaving New York heading to Vermont's safe zone with Anna broadcasting a message telling all other survivors that she is with Neville and is heading to the safe zone.