LOS ANGELES (AP) -- Ethan Hawke, who played the father in "Boyhood," said he was stunned by "the reality of what's happened with this movie."
It was shot over 12 years with the same cast growing older in real time and was nominated for six Oscars, including best film.
"This movie started as a dream 12 years ago," he said on the Oscar red carpet. "What if? What if? It seemed so ludicrous.
"The biggest challenge is figuring out how to make the people have a continuity to them so they're changing but they don't seem like different people," he said of playing the same character over 12 years.
--Xi Xi Yang -- Twitter: www.twitter.com/XiXiYang