Sir Keir Starmer has said he wants to increase UK defence spending to 3% in the next parliament - ahead of his White House meeting with Donald Trump.
Addressing his upcoming visit to the White House to meet Mr Trump, he said he wants the UK's relationship with the US to go from "strength to strength".
Labour promised in their manifesto to increase defence spending to 2.5% of GDP from the current 2.3%, however, ministers have previously refused to set out a timeline.
However, after Donald Trump came to power in January, all European governments have faced increasing pressure to raise defence spending immediately.
The prime minister, in an unexpected statement in parliament, announced spending would be increased to 2.5% of the UK's GDP by 2027.
