Remarks by US presidential hopeful Donald Trump on Muslims were "divisive, stupid and wrong" British Prime Minister David Cameron told parliament on Wednesday.

"I think his remarks are divisive stupid and wrong and I think if he came to our country he would unite us all against him," Cameron said when asked whether he supported a petition to ban Trump from entering Britain.

Trump has vowed to ban all Muslims from entering the United States if he succeeds in his bid to become the next US president.