The Croatian participating broadcaster, Hrvatska radiotelevizija (HRT), organised the national final Dora 2024 to select its entry for the contest.

Croatia was drawn to compete in the first semi-final of the Eurovision Song Contest which took place on 7 May 2024 and was later selected to perform in position 7.

The competition took place at the HRT studios in Zagreb,[4] the first time since 2011 that the contest was not held in Opatija, and was hosted by Duško Čurlić, Maja Ciglenečki and Anja Cerar.

[4] Twelve entries performed in each semi-final, with eight qualifying for the final based on the results of a public televote.

[14] On 15 September 2023, HRT opened a submission period where artists – required to hold Croatian citizenship – and composers were able to submit their entries to the broadcaster until 30 November 2023.

[17][18] An expert committee reviewed the received submissions and selected twenty-four entries (plus four backups), which were announced on 15 December 2023.

[15][6][9][17][18][19] Additionally, Severina, who won the competition in 2006 and represented Croatia in Eurovision the same year, was a backup dancer for Let 3's performance.

The winner, "Rim Tim Tagi Dim" performed by Baby Lasagna, was decided by a combination of votes from a professional jury and the Croatian public via televoting.

The interval act of the final saw Let 3 and Jovanka Broz Titutka perform Let 3's Eurovision 2023 entry "Mama ŠČ!

[33] HRT received further criticism for poor quality of the selected entries[34] and the audio and technical difficulties.

[35] Following Baby Lasagna's performance in the first Eurovision semi-final, Index.hr further criticized HRT for placing him as a backup entry, calling out the jury, consisting of Željko Mesar, Igor Geržina, Dražen Miočić, Robert Urlić, Tomislav Krizmanić and Ema Gross, and disputing their competence.

[36] As part of the promotion of his participation in the contest, Baby Lasagna attended the PrePartyES in Madrid on 30 March 2024, the London Eurovision Party on 7 April 2024 and the Eurovision in Concert event in Amsterdam on 13 April 2024[37][38] – the latter preceded by an appearance on the Dutch TV show Beau [nl], broadcast on RTL 4.

[49] The shows' producers then decided the running order for the semi-finals; Croatia was set to perform in position 7.

[63][64] HRT appointed again Ivan Dorian Molnar as its spokesperson to announce the Croatian jury's votes in the final as in 2021 and 2022.

Each participating broadcaster assembles a five-member jury panel consisting of music industry professionals who are citizens of the country they represent.

[66] The individual rankings of each jury member as well as the nation's televoting results were released shortly after the grand final.

The following members comprised the Croatian jury:[62] Following Baby Lasagna's second place finish at the 2024 contest, the Zagreb Assembly announced it would organise a series of events to welcome the singer back to the country.

Attendees included Tomislav Tomašević (Mayor of Zagreb) and Andrej Plenković (Prime Minister of Croatia).