Volodymyr Zelensky confronted Viktor Orban for a “frank” conversation at the inauguration of new Argentina president Javier Milei on Sunday.
The confrontation came just days before a European Union summit on Thursday and Friday where the bloc will decide whether to start membership talks with Ukraine and provide Kyiv with additional aid.
Video footage showed the Ukrainian and Hungarian leaders in animated conversation on the sidelines of the event in Buenos Aires.
“It was as frank as possible and obviously it was about our European affairs,” Mr Zelensky said in his nightly video address.
Every EU member state has to agree in order for accession talks to begin and Mr Orban has repeatedly said he opposes Ukraine joining the bloc.
He has also threatened to block moves to provide Kyiv with an additional £42billion ($53.8bn) in financial aid between now and 2027.
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