VAR is already used in a number of Europe's top leagues, including Spain's La Liga, Germany's Bundesliga and Serie A in Italy and was widely seen as a success at this summer's World Cup.
UEFA Champions League confirmed that Video Assistant Referees (VAR) will be implemented from the knockout stages in the ongoing season .
The technology, which is considered as the game-changing by FIFA, will also be used in the Nations League finals in June.
European football's governing body had previously stated its intention to introduce VAR only from the start of the 2019-2020 season.
"If we can do it before, why wait? We cannot afford any mistakes if we can do it earlier," said UEFA president Aleksander Ceferin after a meeting of the European football body's Executive Committee.
"We are ready to use VAR earlier than initially planned and we are convinced that it will be beneficial for our competitions as it will provide valuable help to match officials and will allow to reduce incorrect decisions."