The visit will include talks about details of support for Ukraine, Paweł Szrot, chief of staff to Polish President Andrzej Duda, told reporters.
Meanwhile, Lithuanian President Gitanas Nauseda tweeted that the four leaders were "heading to Kyiv with a strong message of political support and military assistance."
German President Frank-Walter Steinmeier planned to visit Kyiv at the same time, but was not welcomed by Ukraine, the Reuters news agency reported.
Germany's Bild newspaper reported that Ukraine's Zelensky had rejected Steinmeier's plans to visit due to the German president's close ties with Russia in recent years and his support for the contested Nord Stream 2 gas pipeline from Russia, according to Reuters.
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Source: IAR, PAP, Reuters