Theatre company A Place For Us returns to the hall to present Romeo and Juliet and Hamlet.
Audience members are invited to bring their picnic baskets or enjoy treats from Bake and Roast.
A spokesman for Bolton Library and Museum said: “Hear ye, hear ye!
“Lo! The much-lauded A Place For Us returns unto Smithills Hall this fair summer, bearing a wondrous double bill for thine delight, come Saturday, 25 July.
“First, behold the tragic passion of Romeo & Juliet—two lovers bound by fate and folly.
“Then, as twilight deepens, witness Hamlet—a tale of vengeance, madness, and mortal doom.
“Bring forth thy picnic basket or partake in delectable treats from Bake & Roast.
“Recline upon blanket or chair and savour these tales beneath the open heavens (weather most kind, we hope!).
“Pray note: space permits blankets and chairs, yet no picnic tables may enter this fair garden.”
The outdoor products start at 4pm.
For tickets and more information, visit the Bolton Library and Museum Facebook page.