French President Emmanuel Macron, European Commission President Ursula von der Leyen, German Chancellor Friedrich Merz, Finnish President Alexander Stubb and Italian PM Giorgia Meloni all said they would join Starmer and Vance at the White House on Monday.
Trump has said he wants to bypass securing a ceasefire in Ukraine in favour of a permanent peace agreement.
Putin reportedly presented Trump with a peace offer during talks in Alaska that would require Ukraine withdrawing from the Donetsk region of the Donbas.
In return, Russia would freeze front lines in Zaporizhzhia and Kherson.
However, the Ukrainian president has previously ruled out ceding control of the Donbas, saying it could be used as a springboard for future Russian attacks.