Diplomatic Act is a comedy science fiction novel written by Peter Jurasik and William H. Keith Jr., published in August 1998.

The novel was inspired by Jurasik's role as extraterrestrial ambassador Londo Mollari in the science fiction series Babylon 5 (1993–1998).

The lead character in the novel, Faraday, who is an actor on a science fiction television show where he plays an extraterrestrial diplomat, bears some similarity to author Jurasik, as Jurasik played extraterrestrial ambassador Londo Mollari in the science fiction series Babylon 5 (1993–1998).

[2] It also bears similarities to the 1995 science fiction/comedy television film The Adventures of Captain Zoom in Outer Space, as well as John Scalzi's Redshirts published in 2012.

[3] Publishers Weekly reviewed that novel calling it a "lightly entertaining story" that "moves briskly and includes fast action".