The US President Donald Trump has arrived in Vietnam for his second summit with North Korean leader Kim Jong-Un.

The two men will sit down for talks in the northern city of Hanoi tomorrow.

Mr Kim arrived in the city to throngs of flag-waving crowds earlier this morning.

He travelled 4,000km through China on his personal train to become only the second leader of the reclusive State to visit Vietnam.

North Korean leader Kim Jong Un, centre right, is welcomed after arriving in Vietnam by train, 26-02-2019. Image: AP Photo/Minh Hoang

President Trump will be hoping for real progress on North Korea's nuclear programme - following a loose statement about denuclearisation published after their first meeting in Singapore.

There has been little movement towards denuclearisation since the summit eight months ago, however President Trump has remained upbeat about this week's talks.

He boarded Air force One in Washington on Monday and arrived in the last hour after making refuelling stops  in England and Qatar.

The motorcade carrying North Korean leader Kim Jong Un arrives at the Melia Hotel in Hanoi, Vietnam, 26-02-2019. Image: AP Photo/Vincent Yu

The two leaders will sit down for dinner on Wednesday before formal talks get underway on Thursday.

In a Tweet yesterday, he said North Korea can become an "economic powerhouse" if it completely gives up its nuclear ambitions.

Meeting for breakfast with our Nation’s Governors - then off to Vietnam for a very important Summit with Kim Jong Un. With complete Denuclearization, North Korea will rapidly become an Economic Powerhouse. Without it, just more of the same. Chairman Kim will make a wise decision!

— Donald J. Trump (@realDonaldTrump) February 25, 2019

Few observers expect the Hanoi Summit to lead to a formal pledge to eliminate North Korea's nuclear weapons.

However, an official declaration that the 1950-53 Korean War is over may be possible.