Among the speakers were US actors Hayek and Matthew McConaughey, award-winning scientist and environmentalist Dr David Suzuki, Canadian astronaut Julie Payette and Bindi Irwin, the young daughter of the late Australian wildlife expert, Steve Irwin.

BBC: 'Space clown' hosts global show

Mr Stainton said Mr Irwin's wife, Terri, and the couple's two children - Bindi, eight, and Bob, two - were coping "quite well".

BBC: NEWS | Entertainment | 'Funeral held' for Steve Irwin