- Evan Williams, Ian Williams, Graham O'Loughlin
- 3:13:09 hour(s):minute(s):second(s)
- United Kingdom (London)
The fastest marathon in a three person costume is 3 hrs 13 min 9 sec, and was achieved by Evan Williams, Ian Williams (both UK) and Graham O'Loughlin (Ireland) at the 2017 Virgin Money London Marathon in London, UK, on 23 April 2017.
The team ran for the charity Heads Together.