European Council chief Charles Michel has called Thursday a "decisive moment" for the bloc as EU leaders meet to discuss Ukraine's bid to gain membership.
"This is a decisive moment for the European Union. A geopolitical choice that we will make today," Michel told reporters on his way into the European Council summit in Brussels.
EU leaders are considering whether to approve the European Commission's decision last week to grant Ukraine EU candidate status.
The European Council President said he was "confident" that EU leaders will grant candidate status to Ukraine and Moldova and "express a clear and strong" European perspective for both nations.
European Parliament chief Roberta Metsola also hailed Thursday as a "historic" day, expressing her "hope" that Ukraine's candidate status will be given the greenlight.
"A day where I thought we would wait much longer to have it on paper, and I really welcome the unity and the leadership of the European Union on this," she said.