A jester, food supplement, French maid and monarch have broken Guinness World Records titles at the Blackmores Sydney Marathon.
Alexander Scherz, the first of four record breakers, flew from Switzerland to break his own record title for the fastest marathon runner dressed as a jester.
Scherz originally set the record at the London Marathon in 2012 and ran across the line on Sunday at 2 hours, 59 minutes and 54 seconds.
The Sydney Running Festival saw more than 34,000 people running from Milsons Point at the bridge's north pylon to the Sydney Opera House or Royal Botanic Gardens.
The marathon, a 42-kilometre course, is the second marathon that Guinness World Records has partnered with.
Howard Dawson, dressed as a food supplement, Dominic Sweeney-Nash, dressed as a French maid, and Joseph Peach, dressed as a monarch, were among the group of four to break record titles.
Adjudicator Solvej Malouf said it was an exciting day for all who participated.
"There is such a buzz here and the crowd has been loving our costumed runners," she said.
"Fingers crossed we can build on this momentum next year."