Kim Kardashian and Kanye West are celebrating four years of marriage.

The 37-year-old "Keeping Up with the Kardashians" star posted a never-before-seen photo from her wedding to West on their anniversary Thursday.

The picture captures an intimate moment between Kardashian and West during their nuptials in Florence, Italy. Kardashian penned a sweet message to the 40-year-old rapper and designer in the caption.

"4 years down and forever to go.... Thank you babe for giving me our family and caring so much about us. Thank you for inspiring me on a daily, I'm so lucky. I can't wait for forever... Happy Anniversary," she wrote.

Kardashian and West share three children, 4-year-old daughter North, 2-year-old son Saint and 4-month-old daughter Chicago.

Kardashian discussed her family in an interview with "Live! with Kelly and Ryan" last week.

"Three is wild," she said. "[Chicago] really is so sweet. My son loves her. They all really love her."

Kardashian and West welcomed Chicago via gestational carrier in January. The reality star confirmed she's open to having a fourth a child.

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"I would maybe try for one more. I really, really enjoyed the surrogacy process," she said.

The "Keeping Up with the Kardashians" star shared a cute photo Tuesday of Saint hugging Chicago.

She treated Saint and North to a trip to Disneyland the same day.