NOTE: This article was published before the 2017 Academy Awards ceremony on Sunday night, where a mix-up over envelopes meant La La Land was announced as the Best Picture winner instead of the actual winner Moonlight.

At the Oscars on Sunday two partners from accountancy firm PwC will be escorted to the event by the Los Angeles Police Department. They’ll be far from the most famous people walking down the red carpet at the Dolby Theatre in Hollywood - but without them, there’s no show.