Belgium was represented by Louis Neefs, with the song '"Jennifer Jennings", at the 1969 Eurovision Song Contest, which took place on 29 March in Madrid. Neefs was chosen internally to be the Belgian representative, and the song was chosen in the national final on 22 February. Neefs had previously represented Belgium in the 1967 contest in Vienna.

The final was hosted by Nand Baert at the Amerikaans Theater in Brussels. Six songs were performed by Neefs and the winner was chosen by an "expert" jury.

On the night of the final Neefs performed 10th in the running order, following Sweden and preceding Switzerland. Neefs is remembered for his quirky performance, which involved throwing his arms in the air in an apparently random manner. At the close of the voting "Jennifer Jennings" had received 10 points (3 from the United Kingdom, 2 from Norway, Spain and Switzerland and 1 from the Netherlands), placing Belgium joint 7th (with Ireland) of the 16 competing entries. The result matched Neefs' 7th place in 1967. The Belgian jury awarded its highest mark (3) to joint contest winners Spain.

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