The two hip-hop stars secretly tied the knot in September 2017, and share 1-year-old daughter Kulture Kiari Cephus, who was born July 10, 2018.
Offset also posted a heartfelt anniversary message on Instagram, writing, "Today is our anniversary nobody believed it was real. We got married without nobody knowing because it was only between us and God! Now we have beautiful Kulture and a big family. I love you 4ever and after life."
The Migos rapper's post included a montage video of special moments between the couple, including Offset's onstage marriage proposal to Cardi in October 2017.
The couple's marriage experienced some turbulence over the past year. Last December, Cardi announced on Instagram that she and Offset had split following rumors of his infidelity.
“We got a lot of love for each other, but things just haven’t been working out between us for a long time," she wrote.
Soon after, Offset begged for Cardi to take him back, promising that he was "trying to be a better person." The couple reconciled a few months later in February.