Who played Omar Little in 'The Wire'?

In which TV series is Clark Kent a main character? Who played Lizzie McGuire in 'Lizzie McGuire'? Who played Jimmy McNulty in 'The Wire'? In which TV series is Jimmy McNulty a main character? In which TV series is Omar Little a main character? Who played Stringer Bell in 'The Wire'? In which TV series is Stringer Bell a main character? In which TV series is Vic Mackey a main character?