The blimp has been approved just in time for President Trump's visit.
A giant balloon dubbed "Trump baby" has been given the green light to fly near parliament during the president's UK visit.
London mayor Sadiq Khan's Greater London Authority has approved a request for the flight after thousands signed a petition and a crowdfunding campaign raised more than £16,000 to get the six-metre inflatable off the ground.
Strict rules are in place for the flight from Parliament Square Gardens, with the balloon being tethered to the ground and restricted from floating higher than 30m (98ft).
It will fly between 9.30am and 11.30am on Friday 13 July - coinciding with the president's visit to the UK and a "Stop Trump" march in central London.
A spokesperson for the Mayor of London said: "The Mayor supports the right to peaceful protest and understands that this can take many different forms.
"His city operations team have met with the organisers and have given them permission to use Parliament Square Garden as a grounding point for the blimp."