The characters names were chosen based on their meanings.
Caleb "Faithful" "Devoted"
Aimee "Dearly loved" "Beloved"
Shayleigh "Bold" This name was actually chosen because it is the writer's favorite name for a girl.
Marc Powers (Caleb), didn't get a haircut or shave in the 6 months prior to the start of production.
The story was mostly inspired by a lucid dream.
The film's title is in reference to the love between Caleb and Aimee as being "undying" "eternally beautiful".