Ignazio "Nat" Curcuruto (October 1, 1903 – April 16, 1975), better known by his stage name Joe Kirk, was an American radio, film, and television actor who was best known for playing the role of Mr. Bacciagalupe on The Abbott and Costello Show.

Kirk was a regular supporting player on Abbott and Costello's radio show during World War II and the postwar era of the 1940s.

Kirk played Mr. Bacciagalupe and others on the duo's appearances on The Colgate Comedy Hour and then on the television version of The Abbott and Costello Show.

In the episodes featuring his character, Mr. Bacciagalupe would often show impatience with the indecision portrayed by Lou Costello, whom he called by his Sicilian name, Luigi.

Sometimes he would find his place of business wrecked by Abbott and Costello's antics; at other times he would confound them completely and they would retreat in confusion as he crowed in triumph.

[1] Kirk continued acting through the late 1950s, with appearances in The Jackie Robinson Story (1950), the 1956 Bowery Boys comedy Hot Shots and Fritz Lang's drama Beyond a Reasonable Doubt (1956).