The conversation began shortly after 4 pm, according to the White House press secretary Karoline Leavitt, according to AP.
Trump is also expected to call Ukraine's President Volodymyr Zelenskyj.
Prior to the phone call with Putin, Karoline Leavitt that Donald Trump's goal with the call is to get an end to the war, but that he is "tired and frustrated over both sides of the conflict". Vice President JD Vance said in turn that Trump is "more than open" to giving up the US's attempts to get a ceasefire and ultimately peace in Ukraine.
The Kremlin's spokesperson Dmitrij Peskov calls the conversation "significant, considering the talks that took place in Istanbul. He is referring to last week's direct negotiations in Istanbul, which were of their kind in over three years.
Last week's negotiations took place at a lower level after Zelenskyj challenged Putin to a personal meeting in Turkey – which Russia's president did not show up for.
Even in March, Trump and Putin talked to each other on the phone, but they have not met physically since Trump's first term in the White House.