This is pulling at our heartstrings!
Peta Murgatroyd wished fiancé Maksim Chmerkovskiy a happy birthday on Tuesday, ringing in his 37th with an amazingly sweet message.
WATCH: Peta Murgatroyd Shares Intimate Bed Selfie With Maksim Chmerkovskiy on Their Anniversary
"To my best friend...my partner, for the remainder of the most incredible years to come," the 30-year-old Dancing With the Stars pro shared. "You are forever the light that makes my soul ignite, you're the text book definition of my true soul mate. I never believed in one until I met you. My love for you is never ending."
And the birthday love didn't stop there.
Murgatroyd followed up the snap with a heartwarming picture of Chmerkovskiy holding the couple's newborn son, Shai Aleksander, writing, "...and to the best Father in the world Happy Birthday, Shai is so fortunate to have you as his guardian and protector for life. I see you with him and cry with the amount of love that is in your eyes. Our love for you is for eternity, forever the 3 of us are together."
WATCH: Val Chmerkovskiy Can't Stop Gushing Over His 'Handsome' New Nephew Shai: He's 'Changed My Brother' Maksim
Adorable social media interactions are nothing new for the couple. Over the weekend, Chmerkovskiy shared a picture with his fiancee, captioned, "First date night of 2017 with my queen."
Happy birthday, Maks!
WATCH: Maksim Chmerkovskiy Reflects on Fatherhood: 'I'm the Happiest Person That's Ever Lived'
Meanwhile, Chmerkovskiy's brother, Val, recently opened up about his new baby nephew.
Watch the video below.