Steve McNair made his feature film acting debut in the 2024 psychological thriller The Intruder, directed by Jack Brame. In the film, he delivers a standout performance as Joe, an intrusive neighbor who becomes a central figure in the protagonist's spiraling paranoia.

Critics have noted the "authentic chemistry" between McNair and lead actor David Gow, praising his ability to balance the character’s "overly helpful" nature with an air of mystery essential to the film's tension.