Cardi B has filed for divorce from her husband of three years, describing their marriage as "irretrievably broken".
The couple tied the knot the secret in 2017, sharing the news with their fans a year later. Their daughter Kulture was born in July 2018.
Court documents show that the Grammy-winning hip-hop star, whose real name is Belcalis Almanzar, filed for divorce in Georgia on Tuesday.
The couple are living in a "bona fide state of separation," court documents state, and the marriage is "irretrievably broken".
And there are "no prospects for a reconciliation," the papers say.
Cardi B, 27, is reported by TMZ to have since filed amended documents for joint custody of the stars' daughter. She had originally sought primary custody.
Offset, 28, is best known for performing with the chart-topping rap group Migos.
Cardi B released her debut album, Invasion Of Privacy, in April 2018 and backed by the singles Bodak Yellow, I Like It and Be Careful it topped the charts in the US.
Her latest single, WAP, the explicit duet with Megan Thee Stallion, hit number one in both the US and UK following its release in August.