Major League Baseball commissioner Rob Manfred was in London to make the announcement and said there was a commitment to play in London in 2020 as well, with the "intention to establish a long-term footprint in the city". The two rivals will meet at London Stadium, which has a 55,000 capacity for baseball, next June 29 and 30.
It's finally official: The Red Sox and Yankees will play a pair of games in London in 2019. "This is our most significant endeavour ever in Europe and we look forward to showcasing Major League Baseball in one of the world's great cities".
The rivalry between two of the sport's most successful teams stretches back more than a century and is widely regarded as the most passionate in baseball.
"This is a major coup demonstrating, once again, that London is the sporting capital of the world and I am excited about a new partnership with MLB and the long-term future of this sport in our great city", he said.
"It's also the first time the Red Sox and Yankees have played one another outside of NY or Boston", added Henry, who also co-owns English Premier League side Liverpool. This series will surely be the most significant worldwide event to date for Major League ball.
The New York Yankees, whose most recent World Series title came in 2009, are the most successful team in Major League Baseball history, with 27 World Series titles.
Both the Red Sox and Yankees have played games on global soil in recent years, visiting the Tokyo Dome for season openers. Major League Baseball announced on Tuesday (Wednesday NZT) that Oakland and Seattle will open next season at the Tokyo Dome on March 20-21.
Yankees right fielder Aaron Judge puts Red Sox relief pitcher Joe Kelly in a headlock after Kelly hit Yankees' Tyler Austin with a pitch.
The teams have met in the American League Championship Series three times, with the Yankees emerging as winners on two occasions.
London already has a strong presence in both the National Football League and NBA.
The NFL has played regular-season games in the capital since 2007, holding 18 games at Wembley and three at Twickenham.