But who is he getting married to? And what will Kat think?
After a few words of wisdom from Freddie, Alfie realises that a grand gesture may be the way to win Kat back.
Freddie helps Alfie with an extravagant flower display for Kat, but things take a turn for the worse when she finds out where the flowers have come from.
Later, Alfie apologises to Kat, insisting that their friendship is all that matters to him and she joins him for a drink in The Vic. When a young woman, Megan, enters the pub, reminding Alfie that he's getting married tomorrow they are both left speechless!
As Alfie tries to explain that Megan is not his fiancé, he offers to bring Kat to meet his real fiancé and learn the truth.
The next day, preparations for Alfie's wedding are in full swing and Kat pushes Alfie to rectify the mess he has made.
EastEnders continues Mondays to Thursdays at 7.30pm on BBC One