Prime Minister Scott Morrison's personal website has been taken over and now plays the rock song: Scotty Doesn't Know.

An internet troll is taking responsibility for claiming the website scottmorrison.com.au after the domain license lapsed overnight.

Instead of displaying information about the prime minister and his policies, the page plays the song about cheating by American band Lustra.

Apparently, the Prime Minister forgot to renew his website and it expired today.

Some guy bought it for 50 bucks.

Now it just plays the punk song, 'Scotty Doesn't Know' by Lustra.https://t.co/NA1SksHoNO#Auspol — Tom Taylor (@TomTaylorMade) October 18, 2018

"So, the PM forgot to renew his website and it expired today ... Most fun I've had with $50 in a long time," Jack Genesin wrote on Facebook.

The website "take-over" has been active for more than 12 hours.

The song about cheating by American band Lustra became famous after being included in the 2004 teen film EuroTrip.

The opening line is: "Scotty doesn't know that Fiona and me do it in my van every Sunday."

A Google search for Mr Morrison's website still comes up with sub-categories of prime minister, Electorate of Cook and local and federal news.