Myanmar's disempowered State Councilor Aung San Suu Kyi was sentenced to four years in prison on Monday.
Junta spokesman Zaw Min Tun said she was found guilty of inciting violence and violating corona requirements.
The disempowered President Win Myint was also sentenced to four years in prison for the same allegations.
Journalists were not admitted to the trial in a special court in the capital, Naypyidaw.
Suu Kyi and Win Myint were deposed and arrested in February after a military coup.
The 1991 Nobel Peace Prize laureate was covered with a series of accusations by the now ruling military junta.
The military had justified its takeover with alleged fraud in the 2020 general election, in which Suu Kyi's party had won a clear victory.
More than 1,300 people have been killed and more than 10,000 arrested in protests against the military since February.