- Who
- Ali King
- What
- 2/51/18 hour(s):minute(s):second(s)
- Where
- United Kingdom (London)
- When
The fastest marathon dressed as a baby (male) is 2 hr 51 min 18 sec and was achieved by Ali King (UK) at the 2014 Virgin Money London Marathon in London, UK, on 13 April 2014.
Ali's record was one of 30 successfully broken and verified onsite by Guinness World Records at the 2014 Virgin Money London Marathon.