Experts at the Metropolitan Museum of Art, New York, have changed their minds about a portrait of Spain's Philip IV.
The picture, painted in 1624, was previously thought to have been executed by an assistant of the great Spanish master, Diego Velazquez.
But art boffins at the museum have now overturned their decision of 1973 and declared that the painting is by the great master himself.
Art expert, Volpone Q Siena, who was consulted over the painting before it went on display this week, said: "It was the label on the back what done it for me.
"It says: 'All my own work, Diego Velazquez, 1624. Not done by no assistant. Not at all.' Fair enough, I thought.
"But have you seen that lip? Ha - that's guy's a Hapsburg all right. Gets me every time I see a Hapsburg portrait, anywhere in the world. I just have to sit down and have a rest until the giggles pass!
"They must have dribbled rotten!"