Denmark participated in the Eurovision Song Contest 2023 in Liverpool, United Kingdom, with "Breaking My Heart" performed by Reiley.

Performing during the show in position 1, "Breaking My Heart" was not announced among the top 10 entries of the first semi-final and therefore did not qualify to compete in the final.

The broadcaster further announced that Dansk Melodi Grand Prix 2023 would be organised in order to select Denmark's entry for the 2023 contest.

[5] Eight songs, all accompanied by the DR Grand Prix orchestra, competed in one show where the winner was determined over two rounds of voting.

Viewers were able to vote via SMS or a newly introduced mobile application specifically designed for the competition.

[10] Two weeks before the national final, it was reported by Danish newspaper Ekstra Bladet that Reiley was at risk of disqualification from the competition, as it was revealed that he previously performed his entry "Breaking My Heart" at Slow Life Slow Live Festival in Seoul, South Korea, in October 2022.

[12] However, it was later decided by DR that the previous performance by Reiley did not give him a competitive advantage in relation to a Danish audience and participation in DMGP.

[17] According to Eurovision rules, all nations with the exceptions of the host country and the "Big Five" (France, Germany, Italy, Spain and the United Kingdom) are required to qualify from one of two semi-finals in order to compete for the final; the top ten countries from each semi-final progress to the final.

On 31 January 2023, an allocation draw was held, which placed each country into one of the two semi-finals, and determined which half of the show they would perform in.