Chris Calle is an artist who has designed more than 30 postage stamps for the United States and hundreds more for countries as diverse as Sweden and the Marshall Islands as well as designs for the United Nations. Chris' US postage stamp design work includes the two stamps in 1994 celebrating the 25th Anniversary of the Moon Landing jointly designed with his father Paul Calle who had designed the iconic First Man on the Moon stamp in 1969. Perhaps Chris' most well known artwork is the $2.40 Priority Mail stamp design of 1989, which depicts Apollo 11 astronauts Neil Armstrong and Buzz Aldrin planting the American flag on the Moon.

During his 20+ years as an illustrator and today, much of his artwork is related to the theme of space exploration. As an official NASA Artist, Calle covered two of the early Space Shuttle missions, producing artwork that is now in the collections of the National Air and Space Museum and NASA. In 1962, his father Paul Calle was one of the original 8 artists chosen to document the final mission of the Project Mercury program.