Thurman plays a stressed mom who struggles to balance parenting and her career in the new movie, which only took in $60,000 in the United States when it opened last year.
But the response to the film was even worse in Britain, where only one person went to watch the movie on March 7, and the film only garnered an embarrassing $132 during the whole weekend.
And producer Jana Edelbaum can't understand why the movie has bombed so badly, telling Britain's The Guardian, "You're kidding? We must have broken a new record for grosses!
"Think about how much crap succeeds at the cinema. 'Motherhood' is not bad. It's a very decent movie. I've seen movies that are not half as good."