Nathan Cleverly will fight WBO light-heavyweight champion Juergen Braehmer.
The fight was confirmed today at a London press conference by promoter Frank Warren, and is likely to go ahead on April 2 in London.
Cleverly, 23, is the current WBO interim champion after wins in his last two fights against Karo Murat and Nadjib Mohammedi.
However Braehmer represents a significant step up in class for the unbeaten graduate, who has put together a 21-fight winning streak.
Braehmer, 32, has a 36-2 (29) record and, like Cleverly, is a former European champion.
Among his victims are Antonio Brancalion, who he stopped in the first round - Cleverly needed five to get rid of the Italian.
"I'm delighted that I've been able to secure home advantage for Nathan," said Warren.
"He's worked incredibly hard for this opportunity, and waited patiently to get his shot.
"He's getting this fight at exactly the right time, and it could be a massive moment in his career. This is a huge fight. Braehmer is a proven champion and belongs at elite level, while Cleverly is young and hungry and could be the next big thing in the UK."
Cleverly added: "I always thought that I would get my shot at Braehmer.
"There was talk that he might be stripped or would vacate the title, but I never wanted that to happen.
"He's the champion and the only way I would consider myself a true champion is if I took the belt from him, rather than picking up the vacant title."