On September 27th, 2018, it was announced that Marnos was invited to join the contest and accepted their invitation. On September 30th, it was announced that Bea Miller was internally selected to represent the nation with the song "Fire N Gold".
On October 28th, 2018, the Marnonian Broadcasting Authority (MBA) confirmed the nations participation for ZSC10. It is highly likely that the nation will again internally select their entry. It was announced on November 14th that the girl group HAIM with the song "Want You Back" would be their entry.