Francis, heralded as the 'people's pope' due to his focus on society's neediest, died aged 88 on Monday just hours after greeting crowds to mark Easter.
In line with Francis's wishes, this morning's ceremony will differ from the funerals of his immediate predecessors.
MAILONLINE BLOG: Follow live coverage from Pope Francis's funeral as world leaders gather in Rome. Francis died on Easter Monday after 13 years in the Vatican.
Gigi Hadid was pictured celebrating her 30th birthday with boyfriend Bradley Cooper and her family at Le Chalet in New York City on Friday.