The United States will be plunged into darkness as the Moon entirely covers the Sun for a few minutes on August 21.
Millions of people have travelled to a 70-mile belt across the US reaching from Oregon on the west coast to North Carolina on the east coast to witness the astonishing natural phenomenon.
Only those under the path of totality will witness the full effect, while others elsewhere in North America will see a partial eclipse.
Temperatures will plunge and the sky will go black.
The solar corona – the hazy aura of light that surrounds the Sun – will also be revealed.
Britons will not be as lucky as the total solar eclipse will not be visible from the UK.
However, Britons will be able to see a partial eclipse just before sunset.
The moon will cover up to 10 per cent of the Sun’s diameter and two per cent of its area.
The eclipse will start at around 7.30pm and will peak at 8.04pm in London and 7.58pm in Edinburgh. It will last for around 40 minutes.
However, the UK weather could be a blight on those hoping to catch a glimpse of the solar eclipse.
Those in the south will be the most likely to see the event, with many crossing their fingers for predicted cloud cover to lift by the evening.
The Met Office’s forecast for Monday evening remains cloudy for much of the country.
The forecaster, said: “Rain in Northern Ireland, western Scotland and northwest England will be heavy at times.
“It will stay mainly cloudy elsewhere but warm bright spells are likely in some southern parts.”
Cornwall was treated to a total eclipse in 1999, however many were disappointed as sea mists covered the sky.
Despite millions of people flocking to the US to capture tomorrow’s eclipse, they also run the risk of seeing nothing at all if clouds make an appearance.
Oregon and Tennessee are the most likely places to see the eclipse as they normally attract clear skies.
However, forest fires raging in Oregon at the moment risk ruining the eclipse for thousands.