Rolf's father died in 1903, and a year later he and his mother moved to Seattle, Washington, following the footsteps of his oldest brother, William, who had moved there a year earlier. By now Rolf's artistic interests were emerging to more than a part-time pleasure.He moved to Chicago in 1908, where he later studied at the Art Institute. He then went on to New York, where he studied with Robert Henri.
During the 1920s and 1930s, his work appeared on many pieces of sheet music, as well as on the covers of many magazines, most famously for movie fan magazines such as Photoplay and Screenland. His work mostly consists of women; Mary Pickford, Bebe Daniels, and Greta Garbo are just a few of the numerous he painted.
Armstrong's work for the Pictorial Review was largely responsible for that magazine achieving a circulation of more than two million by 1926. A year later, he was the best-selling calendar artist at Brown & Bigelow. In 1930, RCA hired him to paint pin-ups to advertise their products, and in 1933 the Thomas D. Murphy Calendar Company signed him to produce a series of paintings for their line.
Rolf Armstrong died in 1960 on the island of Oahu, Hawaii as one of the best "pin-up" artists of the first half of the twentieth century.Wikipedia