The marches, on September 2, are part of what activists have described as 'a consolidated global effort to make the vegan voice heard'.
The London march, which has been organized by activist group Surge with support from The Save Movement and HeartCure Collective, will see activists descend on Parliament, as part of the bid to shine a light on the animal rights message.
Surge co-founder Ed Winters said: "To see this many vegans take to the streets is a humbling sign of the changing attitudes society is having towards the treatment of non-human animals.
"As vegans, we stand against all forms of oppression, with no exceptions defined by species. It is time for society to understand that the life of an animal is worth far more than our taste buds."
According to Surge: "In 2016, Surge hosted the first Official Animal Rights March, where 2,500 vegans marched through London demanding an end to all animal oppression."
More than 7,500 people have said they are interested in attending the London march via the official Facebook page.
The event will start at 12pm on September 2, at the Achilles Statue in Hyde Park.