South Korea’s President Park Geun-hye has become the country’s first democratically elected leader to be forced from office.
The court decision means South Korea must now elect a new president by early May.
Judges unanimously upheld Parliament’s decision to impeach Ms Park over her role in a corruption scandal involving close friend Choi Soon-sil.
She now loses her presidential immunity and could face criminal charges.
There have been angry scenes outside the court, as supporters of Ms Park protested against the verdict.
South Korea’s Yonhap news agency reported that two people had died, including one elderly man who fell from a police van.
Ms Choi meanwhile has been charged with bribery and corruption for allegedly pressuring big companies to give money in return for government favours. Ms Park has been accused of colluding with her. Both women have denied wrongdoing.