There are two artists known as Sienna. The wikis here are sperate. 1. Six-piece Sienna have been quietly making quite a noise in their native Scotland. Formed in Summer 2012 from Kinross -- known to most as home of T In The Park -- they are the first band from their hometown to have performed at the legendary festival, where they packed out the T Break tent (a feat unheard of for an unsigned band), following in the footsteps of fellow Scots Biffy Clyro.