The couple will appear in court on Thursday.
Ntombi Tshabalala and Ace Khumalo have reportedly been arrested for drug possession.
According to Daily Sun, the couple, who won Big Brother Mzansi in 2015, were nabbed in Claremont, near Sophiatown, Johannesburg, on Tuesday.
Police spokesperson Lieutenant Kay Makhubela told the paper that police received a tip-off about a suspicious vehicle in that area. They stopped it, and then found dagga, a dagga grinding machine, and ecstacy.
They were arrested and are facing a drug possession charge. The couple will appear in the Sophiatown Magirstrates court on Thursday.