Pat DiCicco (February 14, 1909 – October 24, 1978) was an agent and movie producer, as well as an alleged mobster working for Lucky Luciano. He married and divorced both Thelma Todd and Gloria Vanderbilt.

Born Pasquale Jiovanni DiCicco to Pasquale and Luigina DiCicco. He was a cousin of Albert R. Broccoli and gave him his well-known nickname "Cubby", who would later become an acclaimed film producer.

It's said DiCicco tried breaking into film industry after his arrival in Hollywood, though many believe his true intention was acting on orders in the crime sydicate under NY crime boss Lucky Luciano, to introduce drug and prostitution vices to growing Hollywood community. A theory was after he began dating film actress Thelma Todd, he found avenue through Todd to enhance his illegal endeavors into film community. By July 1932, DiCicco elopes with Thelma to Prescott, Arizona. They are married by a justice of the peace. The civil ceremony will later be followed by a religious ceremony in Hollywood.

Todd's marriage in 1932 to DiCicco became particularly unstable and frequently erupted in drunken brawls, one of which resulted in a broken nose for DiCicco and an emergency appendectomy for Todd. By March 1934, Thelma divorces DiCicco on grounds of cruelty and incompatibility.

At 17 years old, Gloria Vanderbilt went to Hollywood where she married DiCicco in 1941. DiCicco proved to be a temperamental and abusive husband who called her "Fatsy Roo," and regularly beat her. "He would take my head and bang it against the wall," Vanderbilt said. "I had black eyes." They divorced in 1945, the union ending childless.

In 1953, DiCicco married actress Mary Jo Tarola (born February 27, 1928), also known by her stage name, Linda Douglas. The marriage lasted seven years before ending in divorce in 1960. Linda would go on to marry Baseball Hall of Fame slugger Hank Greenberg in 1966.

DiCicco died in 1978 after long bout with cancer.