Hamilton was joined by Mercedes team principalToto Wolff to flick the switch as WhatsApp, the world's most popular messaging service, turned the iconic Empire State Building green, while the pair were also involved in the launch of the app's new race car emoji.
The British driver - who will join Ferrari in 2025 - was also thrilled to make F1 history, as he got behind the wheel of a Silver Arrow to give a first-ever demonstration of an F1 car in Manhattan during a Mercedes showcase.
Toto Wolff and Lewis Hamilton in New York this week