It was reported last year Mr Morrison's office asked for Mr Houston to be included on the guest list for the state dinner in Washington during the Prime Minister's official trip in September but that was knocked back by the US administration.

After batting away the questions as "gossip" since September, Mr Morrison told radio host Ben Fordham on Tuesday that Mr Houston's name was among a number of names put forward by his office, and that not all of those names were included on the final gust list.

"[Hillsong is] a very large church," the Prime Minister said.

"I mean, they're well known in the United States. And a lot of people in the United States go along to the services every every week."

Mr Houston was censured by the royal commission into institutional child sexual abuse, which found that he failed to alert police to allegations made against his father Frank Houston.

Mr Fordham asked Mr Morrison about the NSW Police investigation into Mr Houston's handling of the report made against his father.

"These are not things I follow closely," Mr Morrison said.

Australia's relationship with the United States has "never been better," Mr Morrison said, pointing out that Mr Houston had been a guest at the White House in the months after the official Australian visit.