They Don't Know is the debut album by UK garage collective So Solid Crew, released on 19 November 2001.

The album features the singles "Oh No (Sentimental Things)", "They Don't Know", "Haters", "Ride wid Us" and the UK singles chart-topper "21 Seconds".

The album's first single, "Oh No (Sentimental Things)", was ineligible for the UK singles charts due to the number of remixes included on the CD single, a decision which then-A&R Glyn Aikins claims was an oversight by the label.

[4] All lyrics are written by So Solid Crew ^ Shipments figures based on certification alone.

This 2001 hip-hop album–related article is a stub.