David Hockney, 1970-71. Ossie Clark and Celia Birtwell in their Notting Hill flat. Tate Britain.
From Wikipedia
Mr and Mrs Clark and Percy is an acrylic on canvas painting by the British artist David Hockney. Painted between 1970 and 1971, it depicts a couple, the fashion designer Ossie Clark and the textile designer Celia Birtwell in their flat in Notting Hill Gate, shortly after their wedding, with one of the couple's cats on Clark's knee. The white cat depicted in the painting was named Blanche; Percy was another of their cats, but Hockney thought "Percy" made a better title.