The contract, which starts with the 2019-20 NHL season, has an average annual value of $7 million. Fleury, 33, could have become an unrestricted free agent after this season and became eligible to sign an extension July 1. He signed a four-year, $23 million contract with the Pittsburgh Penguins on Nov. 5, 2014.

Tweet from @GoldenKnights: 🌸FLEURYHASSOMEREALLYBIGNEWS������#VegasBorn pic.twitter.com/JXRllYGcvo

Fleury made the announcement in a video published on the Golden Knights Twitter account.

"I'm really excited," Fleury said. "My family and I really love Vegas, the organization, my teammates, and I feel very blessed to have the opportunity to keep playing in front of you guys for another couple years."

Fleury was selected by the Golden Knights in the NHL Expansion Draft and helped them reach the Stanley Cup Final in their first season.

"This team gave me a second opportunity in my career," he said. "I'll always be grateful for it. I love the organization. It's nice to get it done before the season so it's not on your mind all year."

Fleury went 29-13-4 with four shutouts in 46 games and his 2.24 goals-against average and .927 save percentage were the best of his 14-season NHL career. He became the 13th goaltender with 400 NHL wins when he made 38 saves in a 3-2 victory against the Philadelphia Flyers on March 12.

He went 13-7 with 2.24 GAA, .927 save percentage and four shutouts in 20 Stanley Cup Playoff games.

Video: Fleury on signing a three-year extension with Vegas

Fleury will be 37 when his contract expires. As for continuing to play at a high level as he gets older, he said, "It's about how you manage your body. The schedule can get crazy at times. It's the little things that make the biggest difference."

Vegas general manager George McPhee said, "We thought the three-year extension was the right extension in terms of time. He's a very quick, athletic goalie, not a lumbering type of goalie. We thought we could get four very good years from Marc."

Selected by the Penguins with the No. 1 pick of the 2003 NHL Draft, Fleury is 404-229-70 with two ties, a 2.56 GAA, .913 save percentage and 48 shutouts in 737 games with the Penguins and Golden Knights. He's third in wins among active goaltenders, behind Roberto Luongo of the Florida Panthers (471) and Henrik Lundqvist of the New York Rangers (431).

In 135 Stanley Cup Playoff games, Fleury is 75-58 with a 2.58 GAA, .911 save percentage and 14 shutouts. He won the Stanley Cup with the Penguins in 2009, 2016 and 2017.