Last month it was revealed that Rachel will arrive on Hollyoaks this spring as the real Lisa Loveday.
And today the BBC has announced that Shaheen, who appeared on Britain's Got Talent in 2009, is joining the EastEnders cast.
He'll be playing 15-year-old Shakil 'Shaki' Kazemi, son of Carmel Kazemi (Dancing On Ice star Bonnie Langford) and brother of Kush (Davood Ghadami), who will arrive in Albert Square with a mission to reunite his divorced parents.
"I’m so excited to be joining the show. I’ve been a fan since I was a little kid so to now be a part of something so iconic is an honour," Shaheen commented.
"I’m also really excited to be working with a legend such as Bonnie Langford. I’m having so much fun playing her son and can’t wait for people to finally meet Shaki."
Shaheen appeared as a singer on the third series of Britain's Got Talent aged just 12 years old, winning rave reviews from the audience for his rendition of Michael Jackson's 'Who's Lovin' You'.
After finishing in seventh place in the grand final, he was invited to perform at the late music legend's public memorial service at the Staples Center in Los Angeles, which was broadcast around the world.
Shaheen, now 19, also appeared in BBC dramas Casualty and Torchwood prior to his time on BGT.