Chmerkovskiy said in the caption that they quietly tied the knot prior to their 300-person wedding last year.
"This was one of the most exciting days of my life! Everything felt very festive, I couldn't take my eyes off my future wife the whole ride to the City Hall and it was as if New York City herself was marrying us," the star recalled.
"I can't believe it's been a year. I still can't believe you chose me. I can't believe I get to live this dream with you by my side for the rest of my life and I promise to earn every second of your love. I love you @petamurgatroyd," he said.
"Happy anniversary baby. #FavoritePersonEver."
FOLLOW REALITY TV WORLD ON THE ALL-NEW GOOGLE NEWS!
Reality TV World is now available on the all-new Google News app and website. Click here to visit our Google News page, and then click FOLLOW to add us as a news source!
Murgatroyd shared a photo from the day on her own account.
"Today I married the man I fell in love with so many years ago. I knew he was the one. There was something so electric between us that people will still tell me about to this day," the 31-year-old dancer wrote.
"I love you @maksimc, this has been an incredible, outrageous year for us! I pray we are this happy for the rest of our lives. You're everything I knew you were. #HappyAnniversary #ToUs," she added.
Copyright 2018 United Press International, Inc. (UPI). Any reproduction, republication, redistribution and/or modification of any UPI content is expressly prohibited without UPI's prior written consent.