"What a great year I'm so Blessed to have met the best Mama in the world," the reality star, 29, captioned an adorable video montage of himself and his pregnant love, 28. "Chyna and I got my baby girl about to be here. CANT WAIT. THANK YOU GOD FOR DOING WHAT YOU DO!! Season Finale tonight of #RobandChyna ! THANK YOU to all who supported us and LETS F–KING GO DODGERS MAN!!"
Moments later, Kardashian posted a cute photo in honor of King's 4th birthday. "HAPPY BIRTHDAY KING!!" he wrote to the birthday boy, who Chyna shares with ex Tyga. "THANK YOU for letting me see what a great Mama you got ! That was the first thing I fell in love with,,, The way she Loves FOR You is something I can't wait for ! Can't wait for the bond I'm going to have with my daughter so Thank You King for allowing me to see that! Everybody Loves You! HAPPY BIRTHDAY WOOHOOOOOO TURN UP ! GO DODGERS."
The once-reclusive Arthur George sock designer and the model are expecting their first child together, a baby girl, in the coming weeks. They've been documenting their roller-coaster romance on Rob & Chyna, a six-part E! docuseries, since early last month.
As Us Weekly previously reported, King celebrated his 4th birthday with Chyna on Saturday, October 15, when she threw him a Lego Ferrari-theme party. A day later, Kardashian's sister Kylie Jenner threw a similar party for King with her boyfriend, Tyga.
Kendall Jenner, Kourtney Kardashian, Scott Disick, Kris Jenner, Caitlyn Jenner and several of the Kardashian-Jenner family's youngest children (including Kim Kardashian and Kanye West's daughter, North) were in attendance at Kylie's celebration for King on Sunday.
The finale of Rob & Chyna airs on E! Sunday, October 16, at 9 p.m. ET.
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