Britain: Queen Elizabeth II
Bolivia: President Jeanine Áñez (interim)
Estonia: President Kersti Kaljulaid
Ethiopia: President Saale-Work Zewde
Georgia: President Salome Zurabishvili
Greece: President Katerina Sakellaropoulou
Nepal: Bidhya Devi Bhandari
Singapore: President Halimah Yacob
Slovakia: President Zuzana Čaputová
Switzerland: President Simonetta Sommaruga
Trinidad and Tobago: President Paula-Mae Weekes
Bangladesh: Prime Minister Sheikh Hasina
Barbados: Prime Minister Mia Mottley
Belgium: Prime Minister Sophie Wilmès
Denmark: Prime Minister Mette Frederiksen
Finland: Prime Minister Sanna Marin
Gabon: Prime Minister Rose Christiane Ossouka Raponda
Germany: Chancellor Angela Merkel
Iceland: Prime Minister Katrín Jakobsdóttir
New Zealand: Prime Minister Jacinda Ardern
Norway: Prime Minister Erna Solberg
Serbia: Prime Minister Ana Brnabić