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Pop art is coming to the National Portrait Gallery after Ed Sheeran agreed to sit for a painting following a chance meeting between his father and the artist.

The singer posed for Colin Davidson at home in Suffolk in August 2015 after the painter asked Sheeran’s art historian father John if he was interested in a portrait. The 4ft by 4ft oil painting will go on show tomorrow. It is based on a three-hour sitting.

Northern Irish-born Davidson said: “When painting a portrait I am looking for the moment when the person is almost unaware of me being there and I feel I got it with Ed. I deliberately didn’t want Ed to perform and that was odd for him. There is a youthful aspect to the portrait but also something experienced beyond his years.”

Davidson has also painted Brad Pitt and Kenneth Branagh.

Ed Sheeran by Colin Davidson can be seen from tomorrow in Room 39, Ground Floor Lerner Contemporary Galleries, at the NPG.