French defender Castello Lukeba (20) has joined RB Leipzig from Olympique Lyonnais on a five-year contract, both clubs said on Friday.
Leipzig will pay 34 million euros ($37.21 million), including bonuses, for the under-21 France international.
"RB Leipzig stands for a particular style of football and for a constant upward journey," Lukeba said in a statement.
"This is a great place for young players to develop at the highest level, as a number of French players have already proven in the past."
Leipzig start their season on Saturday in the German Super Cup against Bayern Munich.