Denne Bart Petitclerc (May 15, 1929 – February 3, 2006[1]) was an American journalist, war correspondent, author, television producer, and screenwriter.

In the 1950s while living and working in Florida, Petitclerc wrote a fan letter to writer Ernest Hemingway.

In 1969 he created for NBC Then Came Bronson, a one-hour drama television show about a motorcycle riding news reporter searching for the meaning of life.

Petitclerc wrote several movies for television and the screenplay for the 1972 feature film Red Sun with Charles Bronson and Toshirō Mifune.

Other credits include the television movies Key West, Men of the Dragon, The Woman Who Sinned, The Vivero Letter and The Cowboy and The Ballerina.

In 1969, Petitclerc donated his collection of Hemingway's letters to Sonoma State University in Rohnert Park, California.