MOSCOW — The presidents of Russia and Ukraine will meet in Paris next month for long-anticipated talks that could change the contours of the five-year-old conflict in eastern Ukraine whose repercussions have spread worldwide.

The talks, scheduled for Dec. 9, will be the first between President Volodymyr Zelensky of Ukraine, the comedian who won the presidency in April on a pledge to end the fighting with Russian-backed separatists in eastern Ukraine, and the Russian leader, Vladimir V. Putin.

At the meeting, officials say, the leaders will aim to make progress in carrying out the terms of a peace deal that was reached four years ago in Minsk, Belarus, but has yet to be implemented. The accord aimed to restore Kiev’s control over separatist-held territory in eastern Ukraine.

Mr. Zelensky has conducted troop withdrawals, coordinated with the separatists, at several points along the front lines to build momentum for the talks, even as the Kremlin has seemed to vacillate over whether Mr. Putin was prepared to engage.