The non-profit behind TED will hold its first-ever live event next month bringing together an impressive line-up of speakers including European Commission President Ursula von der Leyen, teenage climate activist Xiye Bastida, actor Chris Hemsworth, and former US vice president Al Gore.
Known for thought-provoking speeches recorded at exclusive events, TED will stream the five-hour special called "Countdown" on its YouTube channel on October 10 that will feature the British royal, Prince William.
"The moment to act on climate change has been upon us for too long, and now is the time to unite all levels of society — business leaders, courageous political actors, scientists and individuals — to get to net-zero emissions before 2050," said TED head Chris Anderson.
Since starting as an intimate gathering in California 36 years ago, TED has grown into a global media platform with a stated devotion to "ideas worth spreading".
TED has a massive following for its trademark presentations in which speakers strive to give "the talk of their lives" in 18 minutes.
Hundreds of smaller "TEDx" events are planned around the world to encourage local action on climate change.
Prince William has been open in expressing the urgency to act in saving the planet.