Stars of the first gig were Jools Holland and his Rhythm and Blue Orchestra, with special guests Ruby Turner and Sam Brown.
Despite early showers in the afternoon, a large crowd enjoyed lavish picnics ahead of the fabulous concert that set the standard for those to come, including Jools himself (2008 and 2010); Status Quo and 10cc (2011); Jessie J (2012); Simple Minds (2014); and Madness, Lightning Seeds, Nile Rodgers and Il Divo (2018).
Do you remember the 2006 performance? Here is a gallery of pictures to jog your memories.
17. Point made
Jools Holland conducts the crowd at Alnwick Castle in 2006. Photo: Jane Coltman
18. Feast of music
Images from Jools Holland's gig at Alnwick Castle in 2006. Photo: Jane Coltman/Kate Miller
19. The stage is set
A fantastic evening in the Pastures, Alnwick, in 2006. Photo: Jane Coltman
20. Cheeky grin
Jools Holland at the memorable concert in the Pastures, Alnwick, in 2006. Photo: Jane Coltman