The Chicago Blackhawks have agreed to matching eight-year contract extensions with star forwards Jonathan Toews and Patrick Kane.

The team didn't release financial details, but multiple reports said each player will earn $84 million US.

That's an average annual value of $10.5 million, a hefty raise from the $6.3 million both Toews and Kane will make in 2014-15, the final season on their current contracts.

Chicago selected Toews, their captain, with the No. 3 pick in the 2006 draft, and grabbed Kane with the No. 1 overall selection the following year. They combined to lead the Blackhawks to Stanley Cup titles in 2010 and 2013.

Their new deals tie the star forwards to the Blackhawks through the 2022-23 season.

“Jonathan and Patrick have become cornerstones of this franchise during their time in Chicago," GM Stan Bowman said in a statement. "We are excited to ensure they will continue to lead our organization for years to come.”​

Kane had 29 goals and 40 assists and Toews finished with 28 goals and 40 assists this season. The Blackhawks lost to Los Angeles in the Western Conference final.

Toews, who's from Winnipeg, won his second Olympic gold medal with Canada this year in Sochi.

Both players are represented by agent Pat Brisson.

Chicago has much of its core locked up long-term, though the salary cap could force Bowman to drop players in the future. Defenceman Duncan Keith ($5.538 million per year on average) is also signed through 2022-23, forward Marian Hossa ($5.275 million) through 2020-21, and goalie Corey Crawford ($6 million) through 2019-20. High-scoring forward Patrick Sharp ($5.9 million) is signed for the next three seasons, and steady defenceman Brent Seabrook ($5.8 million) for the next two.

The salary cap for next season is $69 million per team, though that number is expected to rise in subsequent years as the NHL's revenues increase.

Chicago has more than $71 million in salary commitments for next season currently on its books, according to capgeek.com.

With files from The Associated Press