The Honorary Committee is made up of the following members by order of acceptance
- H.M. British Ambassador
- Director General of Forestry
- IPPAR President (Heritage Institute)
- H.R.H. D. Duarte, Duke of Bragança
- Prof. Fernando Catarino, Lisbon Botanical Gardens
- Paulo Lowndes Marques
- Mayor of Sintra
- Prof. João Amaral Franco, Agronomy University
- Jorge Jardim Gonçalves, Chairman High Council, Bank Millennium BCP
- Carlos Monjardino, Chairman, Fundação Oriente
- Prof. Gonçalo Ribeiro Telles, Landscape Architect
- J. Hall Themido (former Portuguese Ambassador to the US)
- President of Quercus
- Brenda, Lady Cook
- Luís dos Santos Ferro
- Emma Gilbert
- Prof. António Lamas, Parques de Sintra-Monte da Lua
Siga Monserrate