Simon Stephen Milne MBE FRGS (born January 1959) is a British marine officer and conservationist who has been Regius Keeper of the Royal Botanic Garden Edinburgh since 2014.

[4] Milne was director of the Sir Harold Hillier Gardens and Arboretum from 2000 to 2004 and chief executive of the Scottish Wildlife Trust from October 2004 until February 2014.

Milne was appointed the 16th Regius Keeper of the Royal Botanic Garden Edinburgh in February 2014, replacing botanist Stephen Blackmore.

[6] He is a fellow of the Royal Geographical Society and was conferred an honorary professor of the University of Edinburgh, associated to the School of Biological Sciences in January 2016.

Originally from France, she applied for dual-nationality following the 2016 EU referendum but her application was rejected, leading the couple to publicly criticise the uncertainty created by Brexit.