The silly jester costume is acquired during the Fremennik Isles quest. If destroyed or lost it can be replaced for free by searching the chest in the same room as the King of Jatizso. It consists of four parts: Silly jester boots, Silly jester hat, Silly jester tights, and silly jester top. This outfit could have been used for the 2008 Hallowe'en event.
- This costume set was worn by the character displaying the Dance, Jig, Spin and Headbang emotes, before the addition of the Members Loyalty Programme and emote interface update, in which it is recoloured.
- As a player clicks each piece to equip it, it makes a jingling, bell-like noise.