After she left the competition in November, Dowden said the injury that caused her to pull out of the competition had “nothing to do with any previous health scares”.
The tour will see seven of this year’s couples performing some of their most memorable routines.
All four of the competition’s judges – Craig Revel Horwood, Motsi Mabuse, Shirley Ballas and Anton Du Beke – will take part, along with tour presenter Janette Manrara.
Manrara said it will be “a joy to welcome back the lovely Amy Dowden” as an “extra special treat” for fans.
The celebrities taking part in the live tour were revealed earlier in the month with the pairings now revealed to be; professional dancer Michelle Tsiakkas and EastEnders star Jamie Borthwick, Kai Widdrington and Olympian Montell Douglas, and Katya Jones with opera singer Wynne Evans.
Joining them will be Aljaz Skorjanec with Love Island star Tasha Ghouri, Vito Coppola and actress Sarah Hadland and Nancy Xu with singer Shayne Ward.
Dancers Buswell, Karen Hauer, Neil Jones, Nikita Kuzmin, Jowita Przystal, Robbie Kmetoni and Jake Leigh, will also perform.
McCausland, who is the first blind contestant to win the show, will not take part in the tour due to scheduling conflicts with his stand-up tour.
The UK live tour will visit nine cities in total, namely Birmingham, Sheffield, Newcastle, Glasgow, Liverpool, Leeds, Manchester, Nottingham and London.