Kevin Clifton and Rhiannon Chesterman will be reunited for the limited season at Troubadour Wembley Park.
The pair worked together on the UK tour of Rock of Ages and are back together with Rhiannon being announced in the role of Julia for the production.
Kevin had previously been confirmed to be playing Robbie Hart – the character made famous by Adam Sandler in the 1998 film of the same name.
Also joining the cast are Erin Bell as Linda, Andrew Carthy as George, Sandra Dickinson as Rosie and Tara Verloop as Holly.
The Wedding Singer is at Troubadour Wembley Park from 30th January to 1st March 2020.