Sealey joins the club following an outstanding 2025/26 campaign with AFC Wimbledon's Under-18s, registering 47 goal contributions as the Dons completed an unprecedented national quadruple.
A South Londoner through and through, the 18-year-old grew up in Kidbrooke and began playing grassroots football at an early age before joining West Ham United's Academy at Under-9 level.
After four years with the Hammers and a spell back in Sunday League football, Sealey joined Wimbledon’s Academy ahead of his scholarship years.
Operating primarily as an attacking midfielder, Sealey played a crucial role throughout the historic 2025/26 season, captaining the side to the EFL Youth Alliance Cup before helping them lift the Professional Development League Cup.
He also scored in the Youth Alliance League National Cup Final as the Dons defeated Shrewsbury Town 2-0 to complete the quadruple.
His performances also earned him involvement with the senior squad for the first time, with Sealey named among the substitutes for AFC Wimbledon's League One fixture against Doncaster in January.
Sealey will now become part of Darren Powell's Under-21 setup ahead of the 2026/27 campaign, where they will compete in Premier League 2, the Premier League International Cup and the EFL Trophy.
Upon signing for the club, Sealey said: “It feels incredible to be here. Palace is a great club and had an excellent season last year, so I'm really excited to get started.”
Academy Director Gary Issott added: “Amaari enjoyed an outstanding 25/26 season with Wimbledon, making a significant contribution as they achieved a historic quadruple. His goals, assists and all-round performances showed us he was ready for the next step in his development.
“He’s made fantastic progress in a short space of time, and we believe there is plenty more to come. He’s an intelligent attacking midfielder who can create and score goals, and we’re looking forward to seeing how he continues to develop here at Palace.”
Welcome, Amaari!
