The couple has been dating since early last year (11), and got engaged after just a few months.
The closely-guarded pair was said to be planning a small, top secret ceremony for family and friends in the English countryside, and according to Britain’s The Sun, the big day will take place on Saturday (21Apr12).
The publication reports that superstar Adele will sing at the event after the Mumford & Sons frontman reached out to her.
A source tells the newspaper, “Carey and Marcus are both huge fans of Adele and there will be millions of couples jealous that she is singing for them.
“Adele has always wanted to work with Mumford & Sons so when Marcus asked her to play at his wedding she said yes.”