Kim Zolciak spent her 40th birthday on a romantic getaway with her husband. The reality TV star shared new photos Monday from her tropical vacation with Kroy Biermann. Zolciak, whose birthday was Saturday, posted pictures of herself on the beach with Biermann. The star wore a white bikini with a floral print. "Walking on sunshine," she captioned the slideshow, adding a sun emoji. Other photos show Biermann's swimsuit had a thong bottom. The television personality said in a post Sunday that she was enjoying her trip. "These last 48 hrs have been a dream! Party with Family and friends and now the beach for a short getaway #ThisIs40Baby #YouAreWhatYouThink," she wrote. Zolciak's daughter Brielle Biermann was among those to wish the star a happy birthday. "HAPPY BIRTHDAY to the most beautiful person i know inside and out. I pray to be half the woman\/mom\/wife\/friend you are one day!" the 21-year-old wrote. Zolciak is known for starring on Bravo's "The Real Housewives of Atlanta" and "Don't Be Tardy" reality series. She apologized to co-star NeNe Leakes in April following their showdown at "The Real Housewives of Atlanta" Season 10 reunion.