Demy was announced at the Greek representative on 13 January 2017, while a national final was held in order to select the song she would perform.

Performing 10th during the show, "This Is Love" was announced among the top 10 entries of the first semi-final and therefore qualified to compete in the final on 13 May.

For the first time since 2009, ERT opted to internally select their entrant with the song determined through a public process.

[10] Demy was subsequently announced as the Greek representative on 13 January 2017,[11][12] with her song to be selected through a three-song national final.

Three songs, all written by Dimitris Kontopoulos, were selected to participate in the national final; their titles were revealed by MAD TV on 28 February 2017.

[14][15] Music videos for the competing songs were filmed in Greece and in Odesa, Ukraine, and were presented during the national final on 6 March 2017.

Public voting was conducted through telephone or SMS, while the international jury consisted of members of Greek diaspora communities from nine European cities.

Former Eurovision contestants Sergey Lazarev, Helena Paparizou, Ani Lorak, and Sakis Rouvas also appeared on screen during the event wishing Demy well.

[25] A Greek language version was later created and released in late April 2017 under the name "Oso Zo".

[29] 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.

[30] On 31 January 2017, 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.

[28][39] Demy was joined by three off-stage backing vocalists: Erasmia Markidi, Evgenia Liakou, and Paris Paraskevadis-Planets.

Each nation's jury consisted of five music industry professionals who are citizens of the country they represent, with their names published before the contest to ensure transparency.

This jury judged each entry based on: vocal capacity; the stage performance; the song's composition and originality; and the overall impression of the act.