1. The London Marathon is the Guinness World Record's largest annual fundraising event in the world. The event itself holds a Guinness World Record for one-day charity fundraising, a record it has broken each year for the past nine years.
2. Since its launch 36 years ago, London Marathon runners have raised over £770 million for charity.
3. The highest amount raised by a single runner was £2,330,159.38 by Steve Chalke in 2011.
4. 2015 was the most successful year to date, with funds reaching a cool £54.1 million.
5. The millionth runner is due to cross the finish line this year.
6. The London Marathon is shown on television in nearly 200 countries around the world, so remember to smile at the cameras.
7. A record total of 247,069 people entered the ballot for the 2016 Virgin Money London Marathon. Around 36,000 are expected to start.
8. Keep an eye out for future Olympians at the Virgin Money Giving Mini Marathon, held before the main race. Mo Farah won it three times in a row from 1998 to 2000.
9. Kenya's Wilson Kipsang holds the London Marathon men's course record of 2:04:29, set in 2014.
10. Paula Radcliffe holds the women's (and the world) record with 2:15:25, set in 2005.
11. The fastest female wheelchair athlete was Tatyana McFadden (USA) cruising in at 1:41:14 in 2015.
12. The fastest male wheelchair athlete was Kurt Fearnley (Australia) with 1:28:57 in 2009.
13. The fastest MP to date was Matthew Parris, who ran a crowd-pleasing 2:32:57 in 1985.
14. In 2014 world champion cyclist Chris Newton set a new celebrity record, coming in at 2:45:10, while the speediest female celebrity was Nell McAndrew, clocking an impressive 2:54:39 in 2012.
15. This year look out for celebrities Clarke Carlisle, Natalie Dormer, Iwan Thomas, Chris Evans, Danny Mills, Bobby Norris and Dame Kelly Holmes on the course.
16. There will also be eight MPs running on the day including Rt Hon. Alistair Burt, Rt Hon. Alun Cairns, Edward Timpson, Dan Jarvis, Graham Evans, Jamie Reed, Amanda Solloway and Simon Danczuk.
17. The hottest marathon day was in 2007 when temperatures peaked at 21.7°C.
18. The coldest race day was a chilly 7.6°C in 1994.
20. The most common occupation for people running the marathon is teaching, but scientists, nurses, taxi drivers, electricians and burlesque dancers have all taken on 26.2 miles across London.
21. There will be over 100 official Guinness World Record attempts during the marathon, ranging from the fastest marathon dressed as a dinosaur, to the fastest marathon carrying a fridge. Click here to see the whackiest 2016 attempts.
22. There will be 1,200 St John Ambulance volunteers at this year’s race, including 30 cycle response specialists.
23. There will be 1.25m bottles of water and energy drinks, 738,000 items of food, clothing and rewards and nearly 40,000 finisher bags at the event, with 600 trestle tables for the feed stations located at every mile.
24. 250 tubs of petroleum jelly, 200 bottles of baby oil, 2,000 plasters and 50,000 Lucozade Sport gels will also be available on the route.
25. A group of runners known as the Ever Presents have completed every single London Marathon in the race's 36-year history and will be out in full force on Sunday. Of the original 42 who formed the Ever Presents in 1996 to celebrate 15 London Marathon finishes in a row, just 12 are left.
26. At mile 10.5, the route passes within 300 yards of the Mayflower, the pub where the Pilgrim Fathers met for a quick pint before they sailed to America.
Good luck on race day! Don't forget to tweet us your finishing time @RunnersWorldUK