Britain's Catherine, Duchess of Cambridge, is welcomed as she arrives in Islamabad, Pakistan October 14, 2019.

Britain's Prince William and Catherine, Duchess of Cambridge, arrive by Tuk Tuk as they attend a reception hosted by the British High Commissioner to Pakistan, Thomas Drew, at the Pakistan National Monument in Islamabad, Pakistan October 15, 2019. Chris Jackson/Pool via REUTERS TPX IMAGES OF THE DAY

Britain's Prince William and Catherine, Duchess of Cambridge talk with local schoolchildren during a visit to the Margalla Hills in Islamabad, Pakistan, October 15, 2019. Owen Humphreys/Pool via REUTERS

Britian's Prince William and Catherine, Duchess of Cambridge, visit a school classroom during a trip to Islamabad, Pakistan October 15, 2019.

Britain's Prince William and Catherine, Duchess of Cambridge, pose as they attend a reception hosted by the British High Commissioner to Pakistan, Thomas Drew, at the Pakistan National Monument in Islamabad, Pakistan October 15, 2019. Chris Jackson/Pool via REUTERS

Britain's Prince William and Catherine, Duchess of Cambridge attend a meeting with Pakistan's Prime Minister Imran Khan in Islamabad, Pakistan, October 15, 2019. Andrew Parsons/Pool via REUTERS

Britian's Prince William and Catherine, Duchess of Cambridge pose for a group photo with staff and students at a school during a trip to Islamabad, Pakistan October 15, 2019.

Britain's Catherine, Duchess of Cambridge, interacts with a student at a school on a visit to Islamabad, Pakistan October 15, 2019.

Britain's Prince William and Catherine, Duchess of Cambridge, are welcomed as they arrive in Islamabad, Pakistan October 14, 2019.

Britain's Prince William and Catherine, Duchess of Cambridge walk with an unidentified man during a visit to the Margalla Hills in Islamabad, Pakistan, October 15, 2019. Owen Humphreys/Pool via REUTERS

Britain's Prince William and Catherine, Duchess of Cambridge talk with local people during a visit to the Margalla Hills in Islamabad, Pakistan, October 15, 2019. Owen Humphreys/Pool via REUTERS

Britain's Prince William and Catherine, Duchess of Cambridge attend a meeting with Pakistan's Prime Minister Imran Khan in Islamabad, Pakistan, October 15, 2019. Andrew Parsons/Pool via REUTERS

Britain's Prince William, Duke of Cambridge, attends a meeting with Pakistan's Prime Minister Imran Khan in Islamabad, Pakistan, October 15, 2019. Andrew Parsons/Pool via REUTERS

Britain's Prince William arrives by Tuk Tuk with Catherine, Duchess of Cambridge, as they attend a reception hosted by the British High Commissioner to Pakistan, Thomas Drew, at the Pakistan National Monument in Islamabad, Pakistan October 15, 2019. Chris Jackson/Pool via REUTERS