Watch live: U.K. Prime Minister Liz Truss addresses global leaders at the U.N. General Assembly

British Prime Minister Liz Truss, who took office in September, has announced a sweeping program of economic reforms.
David Dee Delgado | Reuters

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UNITED NATIONS — U.K. Prime Minister Liz Truss is set to address world leaders on the second day of diplomatic choreography in the iconic green-and-gold draped United Nations General Assembly hall.

Earlier in the day, Truss met with U.S. President Joe Biden on the sidelines of the high-level gathering in New York City. The two leaders, who attended the state funeral of Queen Elizabeth II, vowed to continue supporting Ukraine in its era-defining fight against Russia.

Earlier on Wednesday, Russian President Vladimir Putin ordered the mobilization of 300,000 troops for its monthslong assault on Ukraine.

Read CNBC's live blog tracking developments on the war in Ukraine.