Arsenal have signed midfielder Martin Odegaard from Real Madrid for a fee in the region of £30m.
Norway international Odegaard, 22, spent the second half of last season on loan at the Emirates.
He made 20 appearances in all competitions and scored two goals.
The Norwegian joined Real Madrid from Stromsgodset in 2015 but only made eight league appearances for the Spanish side. He also spent time on loan at Heerenveen, Vitesse and Real Sociedad.
He will not be available for Sunday’s Premier League match with Chelsea as he waits for visa clearance.
Mikel Arteta had made it clear at the end of last season that he wanted Odegaard to return to the Emirates on a permanent basis, and has since spoken about wanting to add more new signings to his squad before the transfer window closes on 31 August.
Odegaard joins Ben White, Albert Sambi Lokonga and Nuno Tavares as Arsenal’s signings this summer.