After only a few weeks of dating, the model and her boyfriend, actor-producer Sebastian Bear-McClard, got hitched at a NYC courthouse on February 23.
Sources told the New York Daily News Ratajkowski and her ex were once "inseparable" but drifted apart in the final months of their relationship due to demanding work commitments. Social media star the Fat Jewish and actor Josh Safdie acted as their witness for the wedding.
Ratajkowski and Bear-McClard have been dating for a few weeks.
Ratajkowski, 26, made the surprise announcement in a series of Instagram snaps that offered a behind-the-scenes peek at the intimate event.
She also posted a photo of the two standing on the balcony of her hotel suite with two engagement ring emojis and 'ny'.
'I have a surprise, ' said the next image, showing her holding her dog. He was also the producer of Robert Pattinson's Good Time. The bride skipped a traditional wedding gown and got hitched wearing a golden suit with a double-breasted coat tied at the waist and a black hat with a net veil. She accessorised the $119 long jacket with a belt around her waist and slipped into a matching flared $69.90 pants.
As for the rings, the couple chose to stick to a simple set of gold bands.