Conversation so far:
What was the critical response to the film once?
Once was met with extremely positive reviews from critics.
Did the film Once win any awards?
After 2007's box office success and critical acclaim, it won the Independent Spirit Award for Best Foreign Film.
including which critics acclaimed the film Once?
Steven Spielberg was quoted as saying A little movie called Once gave me enough inspiration to last the rest of the year.

Question: Who was in once?
Self-contained rewrite: Who was in the movie once?