"To the happiest of birthdays my love! How special is this thing called life that we share together?!" Kardashian captioned a photo of herself kissing Thompson at the surprise birthday party he threw her in June.
"I am so blessed to be creating beautiful monumental memories with such a wonderful man!" she gushed. "I hope this year brings you all that you dream of! You will forever be my always! I love you baby!"
Kardashian and Thompson confirmed in September that they're expecting their first child, and later told fans they're having a daughter.
The couple celebrated with family and friends, including Kardashian's sister Kylie Jenner, at a baby shower Sunday.
"Had the most unbelievable baby shower - we felt so much love!" the mom-to-be said on Instagram. "So grateful to be surrounded by a beautiful support system."
Kardashian's clothing line, Good American, will launch a maternity collection, Good Mama, on Thursday.
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The television personality showed off her baby bump in an ad for the collection Monday on Instagram.
"@goodamerican #GoodMama Launches Thursday 3.15.2018," she captioned the photo.
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