Casandra "Cassie" Ventura is taking the stand in Sean "Diddy" Combs' criminal trial, almost two years after she sued her ex-boyfriend.

The 55-year-old hip-hop mogul has been charged by federal prosecutors with sex trafficking, racketeering conspiracy and transportation to engage in prostitution.

She was on the stand for about 4.5 hours Tuesday and is set to return Wednesday for further questioning. Prosecutors have said Combs and his inner circle used threats, violence, drugs, bribery,