The museum described the damage as an irregular 6-inch tear to the lower right-hand corner of the painting, Conservation and curatorial experts "fully expect" that the restoration "will be unobtrusive," the museum said in a statement released Sunday.
The artwork is nearly 6 feet by 4 feet, and depicts a standing acrobat in a pink costume and blue knee-high boots striking a pose against an abstracted backdrop.
The restoration will be done in the coming weeks and the piece will be displayed as planned in an exhibition of 250 Picasso works drawn from the museum's collection, from April 27 to Aug. 1, the museum said.
The accident occurred in a second-floor gallery of early Picasso works when a patron participating in one of the museum's art classes lost her balance and fell on the canvas, the museum said.
It happened during regular visiting hours when other visitors were in the gallery. People who attend the art classes typically roam through the museum in a group stopping in front of works of interest.
"The Actor" was donated to the Met in 1952 by art patron Thelma Chrysler Foy, the elder daughter of auto magnate Walter Chrysler. The museum said it had been included in many major exhibitions of Picasso's works both in the United States and in Europe.
Picasso painted the work in the winter of 1904-05. It marked a transition from his blue period of tattered beggars and blind musicians to his more optimistic and brighter-colored rose period of itinerant acrobats in costume.
