"It has been my lifetime ambition to be on EastEnders, I have watched it growing up with my nan who is a big fan.
"I'm so pleased to get my first TV role, I just didn't believe it would be so big. I've met some of the cast I will be working with who were very friendly and welcoming and I can't wait to start filming."
Tony Discipline, also 22, who plays Tyler, a "bloke's bloke" who lives for the weekend and often ends up in trouble, particularly with "the ladies", said: "It's really exciting to be able to work on a show that you have grown up watching and have followed your whole life.
"I am very grateful to be given this opportunity and am looking forward to working on the show and becoming an EastEnder!"
The soap's executive producer Bryan Kirkwood said: "Both Tony and Matt are fabulous additions to the show.
"Headed up by David Essex, the Moon clan are on their way to becoming an established family in the Square."