AUSTRALIA: Prime Minister Kevin Rudd had hoped to take his carbon-trade scheme to Copenhagen, but parliament rejected laws to set up the scheme this week. Rudd is to play a key negotiating role in the talks.
BANGLADESH: Prime Minister Sheikh Hasina.
BRAZIL: President Luiz Inacio Lula Da Silva is due in Copenhagen Dec 16-18.
BRITAIN: Prime Minister Gordon Brown was one of the first world leaders to commit to attending the Copenhagen talks.
CANADA: Prime Minister Stephen Harper.
CHINA: Premier Wen Jiabao.
ETHIOPIA: Prime Minister Meles Zenawi will head the African delegation. Mauritian Prime Minister Navinchandra Ramgoolam and Seychelles President James Michel will also attend.
EU: European Commission President Jose Manuel Barroso, Dec 17-18.
FRANCE: President Nicolas Sarkozy, Dec 17-18.
GERMANY: Chancellor Angela Merkel, Dec: 17-18 (tentative).
INDIA: Indian Prime Minister Manmohan Singh, Dec 17.
NEPAL: Prime Minister Madhav Kumar Nepal, Dec 15-17.
NETHERLANDS: Dutch Prime Minister Jan Peter Balkenende, Dec 17-18. Also Environment Minister Jacqueline Cramer.
NORWAY: Prime Minister Jens Stoltenberg, Dec. 16-19 (tentative).
POLAND: Environment Minister Maciej Nowicki.
SINGAPORE: Prime Minister Lee Hsien Loong.
THAILAND: Prime Minister Abhisit Vejjajiva, Dec 16-17.
UNITED STATES: President Barack Obama, Dec 18.