During the Olympics, 8,000 Team London volunteers were deployed across the city, in major transport hubs and tourist hotspots, to welcome visitors to London.
Now, Boris Johnson hopes to build on the success of that programme, by using volunteers "as an additional resource for large scale events".
Today, the first pilot scheme begins at St Pancras Station, with Team London Ambassadors providing a warm welcome to international visitors arriving on the Eurostar.
This will be followed by a series of other projects, which will see ambassadors:
helping tourists arriving at events at the 02 arena in Greenwich.
welcoming visitors during busy periods at Gatwick Airport.
selling poppies to raise money for the Royal British Legion.
at Saracens Rugby Club home games when the team returns to London in the New Year.
More top news
The Purple Rain singer died in April 2016
Fewer than a quarter of commuters want fellow passengers to start conversations with them on the Tube.
The grazing is part of a wildlife scheme to help a flower meadow and the insects that rely on it