Lanni Marchant is a Canadian long distance runner from London, Ontario. On October 20th, 2013, Marchant set the Canadian women's marathon record at the Scotiabank Toronto Waterfront Marathon, beating the 28-year-old national record by running it in exactly 2:28:00. This record held until March 10th, 2019 when Rachel Cliff established the new marathon national record in 2:26:56. Marchant participated at the 2016 Summer Olympics both in the 10,000 metres and marathon events.