In an unusual move Ivanka Trump briefly took her father Donald’s seat at a summit of world leaders on Saturday.
The US president had stepped away for a meeting with the Indonesian leader during the G20 meeting.
Ms Trump is an adviser to her father, but a leader’s absence is usually covered by high-ranking officials.
A BBC correspondent at the summit said he could recall no similar precedent. There has been widespread criticism on social media.
Mr Trump returned a short while later to retake his seat between the British prime minister and the Chinese president.
Ms Trump did not seem to make any major contribution to the session on African migration and health during her father’s absence.
A photograph of her presence was tweeted by a Russian attendee, but later deleted.