The two planets, which are about 416 million miles apart in the solar system, are due to rise within 0.3 degrees of each other and will "snuggle" close to each other in the morning.
Tomorrow, Jupiter and Venus will pair up in the sky, shining brightly together just before sunrise.
A conjunction between two or more planets or star clusters happens when they share the same right ascension in the sky and thus look near each other when they are actually not.
Image caption Venus seen crossing the sun. Conjunctions between Venus and Jupiter are not a rare event as they take place at an interval of 13 months, however this time it is the unusual proximity they will appear at, that has astonished astronomers.
Of course, the planets will be nowhere close to reality and what we can see from Earth is mere illusion.
Venus and Jupiter will rise together about an hour before sunrise in the eastern sky, but will remain low on the horizon.
Venus will be 152 million miles (246 million kilometers) from us, while Jupiter is almost four times farther away, at 594 million miles (956 million km).
Stargazers across Britain will be able to enjoy the conjunction for a good hour before light from the Sun obscures the view.
As with all astronomical events, the conjunction will be best viewed in a rural location away from any light pollution.
The phenomenon will be visible to the naked eye itself but if you want to have a clearer view for yourself, it's probably best to use use a telescope or binoculars. A hill or high viewing point can ensure that your view is unobstructed.