Pope Francis made a surprise appearance at a TED talk conference on Tuesday, urging powerful leaders "to act humbly" and said he hoped technological innovation would not leave people behind.

The 18-minute video was filmed in Vatican City and broadcast to the audience at the annual TED 2017 conference in Vancouver.

"The more powerful you are, the more your actions will have an impact on people, the more responsible you are to act humbly," said the pontiff, while seated at a desk.

"If you don't, your power will ruin you, and you will ruin the other."