PALS Fiona May Beaty and Katie Simpson brushed aside the competition when they smashed the Guinness World Record for running the London Marathon dressed as a tooth and toothpaste.
The friends raised more than £2,000 for Derian House Children's Hospice in Chorley with their off-the-wall challenge and attracted the attention of news crews from across the country.
The pair finished in three hours 51 minutes and gained the titles: fastest marathon dressed as a tooth (female) and fastest marathon dressed as a toiletry item (female).
They comfortably broke the former world record of four hours 15 minutes as a tooth and four hours 54 as a toiletry item.
Fiona, who is a dentist, said: "It was an amazing experience. All the way round the crowd were shouting: "Go toothpaste... and tooth!"
"The costume was incredibly hot - it was like running in a wedding dress. My patients think I'm mad, but they've been behind me the whole way."
The madcap idea came from Katie, who wanted to find a way of building some enthusiasm in her children.
The youngsters had lost interest after supporting their mum at the last nine London Marathons, and the world record attempt was an incentive to lure them to the capital.
But getting the costumes past Guinness' strict criteria was no mean feat. Fiona's tooth outfit was rejected on the first four attempts on the grounds of it not being rigid enough, not long enough, and not anatomically correct.
Finally, the outfits were signed-off and the runners could start a strict training schedule to ensure they could go the distance in the suits.
Derian House is a cause close to Fiona's heart, as her good friends are supported by the charity.
Caroline Taylor, communications and marketing manager at Derian House, said: "We're over-the-moon that Fiona and Katie chose to support Derian House with this unique - and quite frankly, hilarious - challenge.
"The money they have raised will make a real difference to children with life-limiting and life-shortening conditions from across the North West and we can't thank them enough."