Meghan, who is expecting her second child, acted as a campaign chair of the event to support the global vaccination effort with Prince Harry.
Speaking via a video message, she said: "The past year has been defined by communities coming together tirelessly and heroically to tackle Covid-19. We’ve gathered tonight because the road ahead is getting brighter.
The Duke and Duchess of Sussex have shared a new photograph of their son Archie to mark his second birthday.
The sepia-toned picture which shows the toddler wearing jeans and trainers and holding a large bunch of balloons, was shared on the couple's Archewell website alongside a call for equal access for all, to the coronavirus vaccine.
Harry and Meghan asked supporters to "join us in advocating for vaccine equity on Archie's birthday" in a post on their website, archewell.com.
"We cannot think of a more resonant way to honour our son's birthday," they said.
