As much as Jim Henson and the Muppets were a major part of childhood, it's Peanuts for which I feel the most love. Snoopy and Woodstock featured heavily in my childhood and I often think about Snoopy's happy dance when I'm feeling like celebrating.

A portrait of Charles Schultz was donated by Mrs Karsh to the Smithsonian's National Portrait Gallery last year and is the Gallery's first image of the cartoonist.

Charles Schultz, 1988 © Yousuf Karsh