There will be a mixture of live music and guest playlists playing throughout the event with activities split between the gallery downstairs and the upstairs studios.
Street artist Dan Mills is providing a blank canvas for everyone to paint and collage.
"He will then transform it and it will be sold at the post-event charity auction along with other works produced during the 24 hours," says Williams.
Whanganui District Library staff will run a Star Wars themed craft project
and artist Brownyn Hughes will present her Osadia of Barcelona inspired steampunk fantasy and makeup workshop transforming willing participants of all ages into living works of art.
And Lovelifelive face painting hire will offer free face painting for children.
On Sunday night there will be a charity auction of works completed during the 24-Hour Art Jam with proceeds going to support Women's Network Whanganui.
24-Hour Art Jam: Space Studio & Gallery, 64 Taupo Quay. From 10am Saturday, October 13 to 10am Sunday, October 14. Doors open for charity auction at 5.30pm on Sunday. See more at Space Jam.