Brian Geraghty has joined the cast of Matt Ross’ crime thriller Kockroach as production shoots in Australia, a late addition to a cast that already includes Taron Egerton and Chris Hemsworth.
The casting move further thickens a high-profile ensemble: the film also lists Zazie Beetz, Alec Baldwin and Rachel Sennott among its principal players. Kockroach is directed by Ross from a screenplay by Jonathan Ames and is adapted from William Lashner’s 2007 novel, a story that follows a mysterious outsider who rises through New York’s criminal underworld to become a powerful crime boss.
Those names matter in raw terms: Hemsworth and Egerton are among the few bankable international stars on a shoot that has pivoted continents to Australia, and the addition of Geraghty — an actor whose credits include The Hurt Locker and Robert Zemeckis’ Flight — signals the production is filling out the supporting ranks with experienced character players as cameras roll.
Context: Lashner’s 2007 novel supplies the plot and tone — a noirish fable about ambition and metamorphosis in New York City — while Ross and Ames have translated that premise into a movie intended to match its cast’s scope. The project had previously attracted attention when its lineup was announced; industry reporting noted that Channing Tatum was initially attached to headline before Hemsworth took the lead, underscoring how the film’s casting has evolved on the way to principal photography.
There is tension beneath the sheen. Despite the marquee names and the fact that shooting is underway in Australia, the production has yet to release a teaser, a trailer or a firm release date. That gap leaves questions about the film’s marketing strategy and timing — and it leaves the public reliant on casting news and on-set sightings to gauge what the finished film will be.
For Geraghty, the role comes after a busy stretch on stage and screen. He was most recently seen in Taylor Sheridan’s Paramount+ series 1923, and in 2025 he completed a run at the Williamstown Theatre Festival in Tennessee Williams’ Not About Nightingales. Those credits, together with his early profile as bomb-disposal specialist Owen Eldridge in The Hurt Locker, mark him as a stylistically versatile presence who can occupy the kind of morally textured supporting role Kockroach’s premise requires.
What this means for Taron Egerton is straightforward: Egerton remains part of a deliberately constructed ensemble led by Hemsworth and rounded out with experienced character actors like Geraghty. The casting pattern suggests Ross is building the film around a central star while surrounding that lead with performers who can carry the novel’s layered New York underworld on their shoulders.
The immediate thing to watch is not plot detail but proof of life from the campaign — a first trailer or a release window will show whether Kockroach is being positioned for awards-season seriousness, summer crowd-pleasing or streaming launch. For now, Geraghty’s arrival answers one practical question about the production’s trajectory: the film is actively assembling the ensemble it needs on location, and Taron Egerton sits at the centre of that ensemble as shooting continues in Australia.
