Maksim Chmerkovskiy shares video of son adorably climbing up stairs with mom Peta Murgatroyd

Maksim Chmerkovskiy and Peta Murgatroyd's son, Shai, turned eight months over Labor Day weekend, and his dad couldn't be more proud.

The Dancing With the Stars pro shared a video on Monday of baby Shai climbing up the stairs with the help of his mommy. 

"We're eight months today, but I swear this kid is already stronger and smarter than some grown ups I know!" Chmerkovskiy captioned the video. "Keep climbing my son! Mommy and daddy always got your back! #babyChmerkovskiy @petamurgatroyd #TfuTfuTfu"

Back in May, ET spoke exclusively with Chmerkovskiy, 37, and Murgatroyd, 31, about how parenthood was treating them.

"I don't think you can stay the same person," Murgatroyd said. "I think once you have a baby it changes your whole life, your whole world, in a good way. But there's nothing sexier, there's nothing more beautiful than seeing your man fall in love with your child even more every day. It's the best."

See photos of the couple together:

26 PHOTOS
Inside Peta Murgatroyd and Maksim Chmerkovskiy's wedding
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Inside Peta Murgatroyd and Maksim Chmerkovskiy's wedding
I am so in awe of the beauty that Danitte Beegel from @metrofloralevents created for us! The owners, Adrian Benitez and Jose Ramirez, were a dream and completely brought my vision to life for our perfect day! Full blog post on @allthingsfamandglam coming soon. ❤️ // Photos by @jamielevinephotography
O H E K A C A S T L E Thank you isn't enough for this... I am eternally grateful to this magical place. It's rooms, staff, kitchen and grounds are bar none. Every single person went above and beyond to make this the most incredible experience for our guests and for Peta and me. Thank you for making @oheka_castle ours for the weekend, exceeding our expectations and sending us off into the married life in the best way possible. We will never forget this...
L I G H T @greessha aka. Greg The Rabbi aka. Frenchy aka. One of the most important people in mine and @petamurgatroyd life..... We are now bonded for life and we will cherish your words to us forever. Thank you... P.S. thanks @mashkii for finding herself an awesome husband and producing one, super cool ring boy! 📸 @jamielevinephotography #chmergatroydwedding
These incredible women are everything to me. So honored I had them by my side on the most magical day. How gorgeous are they in their @homebodii robes? // Photo by @jamielevinephotography
There were 2 #DWTS weddings yesterday! Congratulations to Dancing couple @petamurgatroyd & @maksimc! #chmergatroydwedding 📸: @tonydovolani
My partners in crime for the weekend! 😉💘#chmergatroydwedding
My awesome dates from this weekend #chmergatroydwedding
They said I organized it all ... even the rainbow after the ceremony, but thats one string I couldn't pull. We just watched as the heavens smiled upon their union. #chmergatroydwedding @maksimc @petamurgatroyd
About last night ... just one more #chmergatroydwedding with @earth2tara . Styled by me- dress: @proenzaschouler / shoes: @aquazzura / handbag: @ysl
I love you so much! You were the most beautiful bride ever and I was honoured to be one of your bridesmaids. 🎊🍾👰💍 @petamurgatroyd #beautifulbride #bridesmaid #chmergatroydwedding
❤️// this moment // ❤️ #fatherdaughterdance #chmergatroydwedding #love #friendshipforever
The night before the wedding my gorgeous girl @petamurgatroyd went Glam! Makeup by #TobiMakeup Hair by @mustafaavci Wearing Syrup Lipstick by @maccosmetics #chmergatroydwedding
#chmergatroydwedding The video at the end. EeeeeeEeeeeeeeee!!!!!!!! ❤️
#petamurgatroyd 's #weddingdress by #karensabag @karensabagofficial 👰 #chmergatroydwedding #fashion #fashionblogger #fashionista #fashionable #style #styleblogger #styles #fashionblog #fashionbloggers
Amazing wedding, amazing people. Much love @petamurgatroyd & @maksimc #chmergatroydwedding #areyoukiddingmewiththissunset
Goodnight 🌙 @petamurgatroyd @maksimc #petamurgatroyd #maksimchmerkovskiy #chmergatroydwedding
Peta looked absolutely stunning. #chmergatroydwedding #petamurgatroyd
THE BOSS ❤ @sharnaburgess #sharnaburgess #sharnasquad #chmergatroydwedding #like #dwts
Some pics of Sharna from the wedding of Maks and Peta ❤ i'm so so happy for them and the whole family,it was so beautiful,and stunning,Sharna looking stunning and of course Peta and Maks looking like Queen and King ❤ so so much love !. ~ P 🎉 #sharnaburgess #petamurgatroyd #makschmerkovskiy #valchmerkovsky #rumerwillis #family #wedding #chmergatroydwedding #love #dancingwiththestars #dwts #dwtspros #alanbersten #shaichmerkovskiy #jennajohnson
Because who doesn't love dancing with @iamvalc ❤️🙈#chmergatroydwedding
I love them!! #chmergatroydwedding
Somewhere between rounds of tequila 🥃 #chmergatroydwedding
One of my new brothers... #chmergatroydwedding
#maksandpeta #chmergatroyd wedding @dovolainy oheka castle
My faves! @maksimc @petamurgatroyd #chmergatroydwedding
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