Swedish teenage environmental activist Greta Thunberg has brought her climate change campaign to the Vatican, where she met with Pope Francis and carried a sign saying "Join the climate strike."

Thunberg arrived late for Francis' general audience on Wednesday and took her seat in the VIP section in St. Peter's Square. Francis went up to her at the end of the audience, where Thunberg showed off her sign.

More Images
Pope Francis, back to camera, greets Swedish teenage environmental activist Greta Thunberg, center, during his weekly general audience in St. Peter's Square, at the Vatican, Wednesday, April 17, 2019. (AP PhotoGregorio Borgia)

Swedish teenage environmental activist Greta Thunberg has brought her climate change campaign to the Vatican, where she met with Pope Francis and carried a sign saying "Join the climate strike."

Pope Francis, back to camera, greets Swedish teenage environmental activist Greta Thunberg, center, during his weekly general audience in St. Peter's Square, at the Vatican, Wednesday, April 17, 2019. (AP PhotoGregorio Borgia)

In Francis, Thunberg has found a kindered spirit. The Jesuit pope has made fighting climate change and caring for God's creation a pillar of his papacy.

Pope Francis greets Swedish teenage environmental activist Greta Thunberg during his weekly general audience in St. Peter's Square, at the Vatican, Wednesday, April 17, 2019. (AP PhotoGregorio Borgia)

Pope Francis greets Swedish teenage environmental activist Greta Thunberg during his weekly general audience in St. Peter's Square, at the Vatican, Wednesday, April 17, 2019. (AP PhotoGregorio Borgia)

Pope Francis, partially seen at left, greets Swedish teenage environmental activist Greta Thunberg, center, during his weekly general audience in St. Peter's Square, at the Vatican, Wednesday, April 17, 2019. (AP PhotoGregorio Borgia)

Pope Francis, partially seen at left, greets Swedish teenage environmental activist Greta Thunberg, center, during his weekly general audience in St. Peter's Square, at the Vatican, Wednesday, April 17, 2019. (AP PhotoGregorio Borgia)

Swedish teenage environmental activist Greta Thunberg, second from right, attends Pope Francis' weekly general audience in St. Peter's Square, at the Vatican, Wednesday, April 17, 2019.  (AP PhotoAlessandra Tarantino)

Swedish teenage environmental activist Greta Thunberg, second from right, attends Pope Francis' weekly general audience in St. Peter's Square, at the Vatican, Wednesday, April 17, 2019. (AP PhotoAlessandra Tarantino)

Swedish teenage environmental activist Greta Thunberg, center, stands next to her father Svante Thunberg, left, during Pope Francis' weekly general audience in St. Peter's Square, at the Vatican, Wednesday, April 17, 2019. (AP PhotoAlessandra Tarantino)

Swedish teenage environmental activist Greta Thunberg, center, stands next to her father Svante Thunberg, left, during Pope Francis' weekly general audience in St. Peter's Square, at the Vatican, Wednesday, April 17, 2019. (AP PhotoAlessandra Tarantino)

She is in Rome to headline Friday's "school strike," the growing worldwide youth movement she spearheaded demanding faster action against climate change. Thunberg will also address the Italian parliament.

Pope Francis, back to camera, greets Swedish teenage environmental activist Greta Thunberg, center, during his weekly general audience in St. Peter's Square, at the Vatican, Wednesday, April 17, 2019. (AP PhotoGregorio Borgia)

Pope Francis, back to camera, greets Swedish teenage environmental activist Greta Thunberg, center, during his weekly general audience in St. Peter's Square, at the Vatican, Wednesday, April 17, 2019. (AP PhotoGregorio Borgia)

In Francis, Thunberg has found a kindered spirit. The Jesuit pope has made fighting climate change and caring for God's creation a pillar of his papacy.

Pope Francis, back to camera, greets Swedish teenage environmental activist Greta Thunberg, center, during his weekly general audience in St. Peter's Square, at the Vatican, Wednesday, April 17, 2019. (AP PhotoGregorio Borgia)

Pope Francis, back to camera, greets Swedish teenage environmental activist Greta Thunberg, center, during his weekly general audience in St. Peter's Square, at the Vatican, Wednesday, April 17, 2019. (AP PhotoGregorio Borgia)

Pope Francis greets Swedish teenage environmental activist Greta Thunberg during his weekly general audience in St. Peter's Square, at the Vatican, Wednesday, April 17, 2019. (AP PhotoGregorio Borgia)

Pope Francis greets Swedish teenage environmental activist Greta Thunberg during his weekly general audience in St. Peter's Square, at the Vatican, Wednesday, April 17, 2019. (AP PhotoGregorio Borgia)

Pope Francis, partially seen at left, greets Swedish teenage environmental activist Greta Thunberg, center, during his weekly general audience in St. Peter's Square, at the Vatican, Wednesday, April 17, 2019. (AP PhotoGregorio Borgia)

Pope Francis, partially seen at left, greets Swedish teenage environmental activist Greta Thunberg, center, during his weekly general audience in St. Peter's Square, at the Vatican, Wednesday, April 17, 2019. (AP PhotoGregorio Borgia)

Swedish teenage environmental activist Greta Thunberg, second from right, attends Pope Francis' weekly general audience in St. Peter's Square, at the Vatican, Wednesday, April 17, 2019.  (AP PhotoAlessandra Tarantino)

Swedish teenage environmental activist Greta Thunberg, second from right, attends Pope Francis' weekly general audience in St. Peter's Square, at the Vatican, Wednesday, April 17, 2019. (AP PhotoAlessandra Tarantino)

Swedish teenage environmental activist Greta Thunberg, center, stands next to her father Svante Thunberg, left, during Pope Francis' weekly general audience in St. Peter's Square, at the Vatican, Wednesday, April 17, 2019. (AP PhotoAlessandra Tarantino)

Swedish teenage environmental activist Greta Thunberg, center, stands next to her father Svante Thunberg, left, during Pope Francis' weekly general audience in St. Peter's Square, at the Vatican, Wednesday, April 17, 2019. (AP PhotoAlessandra Tarantino)