SAN SEBASTIAN, Spain (AFP) - US filmmaker Woody Allen, best known for such comedy classics as "Annie Hall," says it will be no laughing matter if Barack Obama fails to win the race for the White House.

"It would be a disgrace and a humiliation if Barack Obama does not win," he told Spanish journalists at the ongoing 56th San Sebastian film festival, where his latest film "Vicky Cristina Barcelona" is being screened.

"It would be a very, very terrible thing for the United States in many, many ways," he said.

Democratic hopeful Obama, Allen said, is "so much better" than Republican rival John McCain, and "represents a huge step upward from (the) incompetence and misjudgement" of the Bush administration.

"It would be a terrible thing if the American public was not moved to vote for him, that they actually preferred more of the same."