Ed Sheeran has been immortalised in a giant portrait by renowned Northern Irish artist Colin Davidson, which goes on display to the public in London from today.

The chart-topper was painted by the Belfast-based artist after he met the singer's father, who is an art historian and curator.

Sheeran sat for Davidson, who is known for his larger-than-life paintings, at his home in Suffolk in August 2015.

The artist made 20 drawings and took reference photos which he then used for two paintings of the singer.

One is in a private collection, while the second impressively-sized oil painting goes on display at Britain's National Portrait Gallery in London today.

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The Shape of Me hitmaker was evidently impressed with the rendering, posting a picture of the painting to Instagram with the caption: "Portrait of me by the wonderful Colin Davidson is on exhibition from tomorrow onwards at the national portrait gallery, check it owwwwttt x"

Davidson, who is well known for his portraits of high-profile figures including Queen Elizabeth, Brad Pitt, Liam Neeson and Seamus Heaney, said it was "a "true privilege to get to know Ed and his family".

He said that when painting a portrait he is "looking for the moment when the person is almost unaware of me being there", something he felt he achieved with Sheeran's painting.

"I feel I got it with Ed," he said. "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."

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Davidson also explained why all of his portraits are the same size.

"The idea is that everyone I paint is an equal and that format allows the face to become something else," he told the BBC

"If you see a painting of a face that is life-size, it never becomes anything else, it is a head - if it is smaller or bigger it can become something else."

Last November, the Queen unveiled Davidson's portrait of her in a ceremony in London.

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