Global growth will pick up faster than previously expected in the coming months as the Trump administration's planned tax cuts and public spending fire up the US economy, the OECD said.
In its twice-yearly Economic Outlook, the Organisation for Economic Cooperation and Development estimated global growth would accelerate from 2.9% this year to 3.3% in 2017 and reach 3.6% in 2018.
The Paris-based organisation was slightly more optimistic about the US outlook, with a forecast for growth next year of 2.3%, up from 2.1% in its last set of estimates dating from September.
US growth would pick up further in 2018 to reach 3%, the highest rate since 2005, as the incoming Trump administration cut taxes on business and households and embarked on an infrastructure investment programme.
That would in turn drive the unemployment rate in the world's biggest economy down from 4.9% this year to 4.5% in 2018, the OECD estimated.
As the US labour market becomes increasing tight and wages rise, the OECD forecast inflation would increase from 1.2% in 2016 to 2.2% in 2018, prompting the Federal Reserve to raise interest rates gradually to 2% by the end of 2018.
A resurgent US economy would help offset softness elsewhere in the world.
The OECD was also slightly less pessimistic about Britain's outlook than it was in September, as the central bank has helped ease the economic impact of the country's decision to leave the European Union.
The UK economy was seen growing 2% this year, revised up from 1.8% previously, although the rate would be halved by 2018.
China, which is not a member of the 35-country OECD, was seen slowing from growth this year of 6.7% to 6.4% in 2017, both slightly better than previously expected.
Stronger US import demand was seen offsetting weak Asian trade for Japan, where growth was revised up to 0.8% for this year from 0.6% previously and lifted to 1% in 2017 from a 0.7% estimate in September.
The euro area's outlook was also slightly brighter despite uncertainties about Britain's future relationship with the continent.
Boosted by loose monetary policy, euro area growth was seen at 1.7% this year and 1.6% in 2017 with both years revised slightly higher from the OECD's September estimates.