The 18-year-old had been heavily linked with a move to Premier League sides Newcastle United but has been officially unveiled by the Seagulls ahead of the 2026/27 campaign.
"Ignore the noise, it was always Brighton," said the teenager in a video on the club's social media.
According to media reports, Brighton are set to pay a 21.5million pound fee for the attacker after signing a five-year-deal with the club.
Yohanna impressed last season with AIK, scoring five goals and providing four assists in 12 appearances in all competition as his former club narrowly missed out on the Allsvenskan title to Malmo.
He is set to compete with Yankuba Minteh on the right side of attack.
Real Madrid have completed the signing of Ibrahima Konate from Liverpool, with the France international joining the Spanish giants on a four-year contract until June 2030.
Manchester City forward Antoine Semenyo says Ghana have a point to prove at the FIFA World Cup 2026 following the 1-0 victory over Panama at Toronto Stadium on Wednesday.
Norway manager Stale Solbakken believes Erling Haaland is ready to make a huge impact as the national team returns to the FIFA World Cup after a 28-year absence.
Crystal Palace have appointed Pierre Sage as their new manager after reaching an agreement with French club RC Lens to release him from his contract.
