Fallin has illustrated roughly 500 notable people for the Wall Street Journal, including President Barack Obama,[2] Paul Newman[3] and Tim Russert for Peggy Noonan's memorial of the newsman in the paper.

Outside of entertainment, Fallin developed relationships with corporate clientele, particularly American Express, which engaged him on several national media campaigns as well as private work.

Fallin's career has spanned work in advertising, Broadway theatre, network television and, most notably, in print for publications such as InStyle and the Wall Street Journal.

He considers legendary caricaturist Al Hirschfeld as a major influence, and mimicked his style early in his career for the Forbidden Broadway work.

Other influences include the German "degenerate" portrait artists of the 1920s, Aubrey Beardsley, Frank Gehry, Eero Saarinen, Richard Avedon, Irving Penn, and Dame Edna Everage.

[7] The relationship with the credit card company continued when in 1990 they commissioned Fallin for several nationwide print ad campaigns in the United States.

For another corporate client, he turned the Playboy bunny, Quentin Tarantino, and the U.S. World Poker Tour champions into bottles of Belvedere Vodka.