The ballroom dancing pair were originally set to appear on tonight's first semi-final but will now perform later on in the week.
Writing on twitter last night, [cat]The Mend[/cat] said: "Tune in tomorrow for live semi finals!! Biggest show of our lives!! #VoteTheMend #FamilyMenders"
They'll be performing alongside favourite [tag]Ashleigh and Pudsey[/tag] as well as dance troupe United We Stand, after the Britain's Got Talent 2012 semi-finalists were revealed yesterday.
Also amongst the first batch of hopefuls to perform live are 11-year-old singer [tag]Lauren Thalia[/tag] and raunchy violinist [tag]Analiza Ching[/tag].
The first Britain's Got Talent live show airs at 8PM tonight on ITV1.
Browse pictures of the first semi-final line up below...