Queen Camilla celebrated the 30th anniversary of Bees for Development at a garden party at Marlborough House, London.
The charity works in more than 50 countries helping people to become self-sufficient through beekeeping – alleviating poverty and protecting bees.
HRH stamped the words “Queen Bee” onto a screen-printed origami bee as part of Leonie Bradley’s Swarm installation.
The Queen erased a bee from Public Erasure-Bees by artist Frances Gynnmet.
She also met producers from Zimbabwe, India, and Trinidad and Tobago.
And also Ota Zika, aged nine months.
Celebrity supporters include Dame Prue Leith,
Hugh Fearnley-Whittingstall, Gyles Brandreth, Charlie Ross, Elaine Paige, Kate Humble, Danny Clarke & Tayshan Hayden-Smith.
The Queen wore a green polka dot Samantha Sung dress.
She met models wearing hats from Welsh milliner Alison Tod.