Denmark participated in the Eurovision Song Contest 2009 held in Moscow on 16 May 2009. Denmark was represented by Brinck with the song "Believe Again". Two other Danish-born contestants also participated at the 2009 Eurovision contest: Susanne Georgi represented Andorra and Yohanna represented Iceland.

As in previous years, Danmarks Radio (DR) selected its entry through the Dansk Melodi Grand Prix (DMGP) contest. On 25 August 2008 (DR) announced that Denmark would compete in the 2009 edition of the Eurovision Song Contest and set a date of 31 January 2009 for the 2009 Dansk Melodi Grand Prix, the Danish national final. Unlike the 2007 and 2008 MGPs, there were no semifinals prior to the grand final, which was held on 31 January 2009.

Dansk Melodi Grand Prix 2009 was held on 31 January at the MCH Messecenter Herning in Herning, Denmark. The show was hosted by previous Danish entrant Birthe Kjær, and TV and radio presenter Felix Smith,.

Ten songs took part in the 2009 edition of DMGP, six of which were selected through an open call for entries, while the remaining four songs were by performers invited to take part by DR. The competing songs were revealed on 9 January 2009, after DR had narrowed down the best songs from the pool of submitted entries. A total of 684 songs were submitted to DR for 2009, an increase from the 443 songs that were submitted in the previous year.

During the DMGP, the ten selected songs competed in the first round of the contest where four songs selected by a 50/50 mix of jury and SMS voting progressed to a "knock-out" round in which the songs competed in pairs. A second round of SMS voting decided the two winning songs from each pair which went on to the final voting round where SMS voting selected the overall winner of the contest.

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