The news was revealed during the final of BBC1 dance competition showStrictly Come Dancinglast night.
I love Eurovision so much, its a dream come true, said Claudia Winkleman.
Last years British entrant, Mae Muller was second to last as Sweden won through Eurovision icon Loreen won.
Olly AlexanderMike Marsland/WireTap
Alexander was previously the frontman of Years and Years, but is now releasing music under his own name.
Eurovision 2024 will comprise a pair of semi-finals and the grand final.
They will be held on May 7, 9 and 11.
