Michael B. Jordan got a successful start as a child actor by playing Wallace on the first season of The Wire, but before that, he had a bit part on an episode of The Sopranos. He pops up during a flashback sequence, harassing Tony Soprano when he was a child, and you can see him at the 7:06 mark of this clip. Interestingly enough, he’s not the only Wire alumnus to do an HBO crossover to The Sopranos as Michael Kenneth Williams had a brief part on the show before he was Omar Little.