Hearing in the dereliction-of-duty case against her government's rice-pledging scheme begins on Tuesday, media reported.
She has been charged with dereliction of duty and abuse of authority in failing to stop graft and losses in the rice scheme according to Section 157 of the Criminal Code and Section 123/1 of the 1999 Counter Corruption Act.
Accompanied by her husband Anusorn Amornchat, she arrived at the Supreme Court in Bangkok for the opening hearing of the dereliction-of-duty case regarding her government's rice-pledging scheme, BBC reported.
Pheu Thai Party (PTP) MPs turned up showed up to give her moral support and encouragement.
The National Anti-Corruption Commission in Thailand accused former PM Yingluck of using the rice-pledging scheme to gain votes from farmers and win the national general election in 2011.