"Anyone who believes it is possible to trade Ukraine's freedom for our peace of mind is mistaken," Meloni said.
The government is Italy's most right-wing administration since World War Two and former close ties between Moscow and both Berlusconi and Salvini have raised concerns over its foreign policy.
Italy's Prime Minister Giorgia Meloni, Deputy Prime Minister and Infrastructure Minister Matteo Salvini and Foreign Minister Antonio Tajani attend the lower house of parliament ahead of a confidence vote for the new government, in Rome, Italy, October 25, 2022.
Meloni's supporters gave her a standing ovation after her 70-minute speech, with some chanting: "Giorgia, Giorgia".
A similar ballot is expected in the upper house Senate on Wednesday, where Meloni also enjoys a clear majority.