Carrie Underwood Reacts to Husband Mike Fisher Retiring From NHL: 'I'll Miss Watching You Play'

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The country crooner couldn't be happier for the next chapter of her husband's next chapter.

Mike Fisher announced he's hanging up his skates after 17 years in the NHL -- and his wife, Carrie Underwood, could not be more supportive.

The 37-year-old hockey player announced on Thursday in a letter to his fans in The Tennessean newspaper that he was saying goodbye to the game. Moments later, Underwood posted a heartfelt message to Instagram, along with a photo of her husband in the rink. "Captain @mfisher1212, I sure am going to miss watching you play and cheering you on with the rest of Smashville, but I so look forward to seeing what God has in store for you in this next chapter of your life," the 34-year-old singer wrote. "You've given your teammates and the game your all for so many years. You've worked so hard and made us all so proud!"

WATCH: Carrie Underwood Adorably Cheers On Husband Mike Fisher in NHL Playoffs

Underwood also gushed over Fisher as a husband and as a father to their 2-year-old son. "Isaiah and I love you so much and are so excited to be able to have you home a lot more," she continued. "We can't wait to cheer on the @predsnhl WITH you in the stands! #ThankYouSmashville #PredsFansForLife"

Fisher started his NHL career with the Ottawa Senators and most recently was the captain of the Nashville Predators. The Predators went to the Stanley Cup Finals in June, but lost to the Pittsburgh Penguins 2-0 in Game 7.

"This is the hardest decision I've ever had to make, but I know I've made the right one. I’ve decided to retire from the NHL," Fisher said in his open letter. "I gradually became certain that it was right for me to retire. I believe God gave me the ability to play hockey, and I was helped by dozens of individuals along the way, so it's not just up to me on when it's time to say goodbye."

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"Endings are always tough, but I believe when something ends, there are new beginnings, new opportunities and new things to be excited for, too," he continued. "A thank you here isn’t enough to say goodbye with, but all those memories, like the moments in the locker room before Game 6, cherishing those is what I hope will keep me, this team and the city intertwined forever."

Fisher also noted that he'll be leaving the game as a Predators fan. "I believe that this team, that this city, is going to win a championship, and I'm going to be the biggest fan,” he declared. "No one will be happier than I will be to see it happen, because, these fans, they deserve it.”

Underwood and Fisher are sure to have more date nights now that her husband of seven years won't have such a hectic schedule. In February, the country crooner admitted to ET that it had been hard for them to make time for one another with their busy agendas, but fans can probably expect the couple to make more red carpet appearances now that Fisher is retiring.

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“I like to go to things with him,” Underwood gushed to ET at the CMT Music Awards in June. “He doesn't get to come to many things with me, because his season is during my season, so he never gets to come to anything except the CMT Awards which is great. I like showing him off.”

Check out more of our recent interview with the American Idol alum: