Brighton are coughing up €20m to sign the free-scoring midfielder.
"I am taking medical tests at Brighton on Tuesday," Trossard confirmed on his Facebook page. “Playing in the Premier League is a wish come true.
"I would like to thank the Genk supporters for the past years. The title was a nice farewell to this great club. You have been a real support for me as a boy of the region.
"As a Limburger, I'll always carry you in my heart."