diff --git a/src/main/kotlin/gg/flyte/twilight/gui/GUI.kt b/src/main/kotlin/gg/flyte/twilight/gui/GUI.kt
index acbb9c3..16645ec 100644
--- a/src/main/kotlin/gg/flyte/twilight/gui/GUI.kt
+++ b/src/main/kotlin/gg/flyte/twilight/gui/GUI.kt
@@ -5,6 +5,7 @@ import net.kyori.adventure.text.Component
 import org.bukkit.Bukkit
 import org.bukkit.entity.Player
 import org.bukkit.event.inventory.InventoryClickEvent
+import org.bukkit.event.inventory.InventoryCloseEvent
 import org.bukkit.event.inventory.InventoryType
 import org.bukkit.inventory.ItemStack
 
@@ -26,6 +27,7 @@ class GUI(val title: Component, val size: Int, val type: InventoryType, val cont
 
     private val keySlot = mutableMapOf<Char, MutableList<Int>>()
     private val slotAction = mutableMapOf<Int, InventoryClickEvent.() -> Unit>()
+    private val onClose = mutableListOf<InventoryCloseEvent.() -> Unit>()
 
     lateinit var viewer: Player
 
@@ -35,6 +37,12 @@ class GUI(val title: Component, val size: Int, val type: InventoryType, val cont
         slotAction[slot]?.invoke(this)
     }
 
+    private val closeEvent = event<InventoryCloseEvent> {
+        if (inventory != this@GUI.inventory) return@event
+        onClose.forEach { it.invoke(this) }
+        remove()
+    }
+
     fun pattern(vararg pattern: String) {
         for ((index, value) in pattern.joinToString("").withIndex()) {
             keySlot.getOrPut(value) { mutableListOf() }.add(index)
@@ -48,6 +56,13 @@ class GUI(val title: Component, val size: Int, val type: InventoryType, val cont
         slotAction[-1] = action
     }
 
+    /**
+     * Set the action to be executed when the inventory is closed
+     */
+    fun onClose(action: InventoryCloseEvent.() -> Unit) {
+        onClose.add(action)
+    }
+
     @JvmName("setSlot")
     fun set(slot: Int, item: ItemStack, action: InventoryClickEvent.() -> Unit = {}) {
         inventory.setItem(slot, item)
@@ -74,6 +89,7 @@ class GUI(val title: Component, val size: Int, val type: InventoryType, val cont
         slotAction.clear()
         inventory.clear()
         clickEvent.unregister()
+        closeEvent.unregister()
     }
 
     companion object {