The business tycoon and Apprentice star visited the BBC soap's set last week to shoot a comedy item which airs this Friday.
The Walford Apprentice sees Sugar arrive on Albert Square and meet Alfie Moon, Billy Mitchell, Ian Beale and Masood Ahmed. He is looking to hire a new apprentice from the Square, but whether he will be impressed by any of the candidates remains to be seen.
Photo gallery - Lord Sugar visits Albert Square:
Copyright: BBC Children in Need/Jack BarnesSugar commented: "It's not every day you find yourself in Albert Square giving Alfie Moon and Ian Beale a piece of your mind, but it's been a really fun day - especially as it's for Children in Need, a cause that means a lot to me."
Shane Richie, who plays Alfie, added: "It's always great to be a part of BBC Children in Need. We are on such a tight schedule at the moment filming for Christmas, but everyone at EastEnders always pull together to do something special for the big night.
"It is such a great charity and makes a real difference to so many children. Doing the sketch was great, we really enjoyed it. Lord Sugar is now working out how to become a regular in The Vic and I am working out how to become a Lord!"
The full sketch will be shown on Children in Need night, which airs on BBC One from 7.30pm on Friday, November 16.