Prime Minister Malcolm Turnbull has used his Christmas message to urge Australians to celebrate the nation's values and diversity.

Mr Turnbull also asked people to remember the less fortunate and make an effort to help out a stranger.

"Whatever you're doing on Christmas this year, please remember those that need our love and support now more than any other time," he said in the video message, released on Christmas Eve.

"Those who are homeless, those who are alone or lonely, and those for whom Christmas is not a joyous celebration."