It is the moment all working parents dread: being at home on an important call, only to be interrupted by a curious child who wants to join in.

One professor has seen that fear realised in spectacular fashion, after his two tiny children stole the show during a live television performance today.

Professor Robert Kelly, an expert on Korean politics, was appearing on BBC World to discuss the serious issue of the impeachment of South Korea's president Park Geun-hye.

But his learned discussion on the 11am bulletin was interrupted by his toddler daughter, who burst into his study swiftly followed by her brother in a baby walker and, finally, their harrassed mother.

Prof Kelly became a worldwide internet sensation within hours, after a producer on the programme published the video to Twitter with the words: "When the kids interrupt you in the middle of live TV... A lovely moment and masterfully handled by our guest this morning on South Korea".