- Mark Williamson, Elizabeth Hardy, Stephen Braddock, Peter Cork
- 04:03:18 hour(s):minute(s):second(s)
- United Kingdom (Kingston upon Hull)
The fastest marathon in a four-person costume is 4 hr 3 min 18 sec, achieved by Mark Williamson, Elizabeth Hardy, Stephen Braddock, and Peter Cork (all UK) at the Hull Marathon, in Kingston upon Hull, UK, on 23 September 2018.
The attempt was driven by Mark Williamson, who is the current holder for Fastest marathon dressed as a telephone box. This time, he wanted to involve friends in this costume race, so their team of four ran as a caterpillar.