CBCNews.ca will carry the event live starting at 1:15 p.m. ET.
Earlier in the day, Harper met 16-year-old Malala Yousafzai, a Pakistani teen who became a champion for girls' education. Yousafzai was shot in the head by the Taliban last fall and later recovered in a British hospital.
Harper tweeted a photo of his meeting with her saying that he, "had the honour of meeting Malala this morning. Her courage & strength serve as an inspiration to us all."
On Wednesday, Harper announced that part of the money Canada pledged during the Muskoka Initiative in 2010 will go to nine projects that will improve the health of women and children in developing countries.