Which movie is “that'll be the day” from?

The clip at the top of this page is from American Movie (1999).

that'll be the day

In American Movie (1999), one line is: “Pay for the film, get the three grand back, pay everyone back, take profits-- That'll be the day.”

used when you are saying that sth is very unlikely to happen

informal · ironic · Heard in 3 moviesPlay Idioms

Oxford100% of films
used when you are saying that sth is very unlikely to happen
That'll be the day.
Pay for the film, get the three grand back, pay everyone back, take profits-- That'll be the day.

Definitions from the Oxford Advanced Learner's Dictionary, 9th edition

Pay for the film, get the three grand back, pay everyone back, take profits-- That'll be the day.

Said in 5 films · #1