Here is a list of participants at the Group of 20 summit, which takes place in east London on Thursday:
ARGENTINA
President Cristina Kirchner
ASSOCIATION OF SOUTHEAST ASIAN NATIONS
Chair, Thai Prime Minister Abhisit Vejjajiva
AUSTRALIA
Prime Minister Kevin Rudd
BRAZIL
President Luiz Inacio Lula da Silva
BRITAIN
Prime Minister Gordon Brown
CANADA
Prime Minister Stephen Harper
CHINA
President Hu Jintao
EUROPEAN COMMISSION
President Jose Manuel Barroso
EUROPEAN COUNCIL
President, Czech Prime Minister Mirek Topolanek
FINANCIAL STABILITY FORUM
Chairman Mario Draghi
FRANCE
President Nicolas Sarkozy
GERMANY
Chancellor Angela Merkel
INDIA
Prime Minister Manmohan Singh
INDONESIA
President Susilo Bambang Yudhoyono
INTERNATIONAL MONETARY FUND
Managing Director Dominique Strauss-Kahn
ITALY
Prime Minister Silvio Berlusconi
JAPAN
Prime Minister Taro Aso
MEXICO
President Felipe Calderon
NETHERLANDS
Prime Minister Jan Peter Balkenende
NEW PARTNERSHIP FOR AFRICA'S DEVELOPMENT
Chair, Ethiopian Prime Minister Meles Zenawi
RUSSIA
President Dmitry Medvedev
SAUDI ARABIA
King Abdullah
SOUTH AFRICA
President Kgalema Motlanthe
SOUTH KOREA
President Lee Myung-Bak
SPAIN
{{/usCountry}}SPAIN
{{/usCountry}}Prime Minister Jose Luis Rodriguez Zapatero
TURKEY
Prime Minister Recep Tayyip Erdogan
UNITED NATIONS
Secretary-General Ban Ki-moon
UNITED STATES
President Barack Obama
WORLD BANK
President Robert Zoellick