Chris Eubank Jr will be joined by younger brother Sebastian on the bill for his super-middleweight showdown with James DeGale at London's O2 Arena.
Light-heavyweight Sebastian faces Richard Harrison over four rounds in what will be the 27-year-old's second appearance as a professional.
Eubank beat Polish fighter Kamil Kulczyk on his debut last February when he was on the undercard for his brother's fight against George Groves in Manchester.
Seb said: "I'm really looking forward to being on this great show at The O2.
"It's been a year since my last fight, but I have had a great training camp in Dubai and really want to move forward with my boxing career and add to the Eubank legacy."
Eubank Jr's clash with former IBF world super-middleweight champion DeGale tops a show that features the Commonwealth heavyweight title fight between champion Joe Joyce and challenger Bermane Stiverne.
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