diff --git a/CHANGELOG.md b/CHANGELOG.md
index 01fe99da7..21452eb84 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -39,6 +39,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   area of the window.
 - `App::prevent_shutdown()` returns a guard that prevents the application from
   closing automatically when the final window is closed.
+- `WindowBehavior::initialized` is invoked once the window has been fully
+  initialized.
 
 ## v0.10.0 (2024-08-20)
 
diff --git a/Cargo.lock b/Cargo.lock
index 5be94d903..1b0ce9e4d 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -106,7 +106,7 @@ checksum = "4e1496f8fb1fbf272686b8d37f523dab3e4a7443300055e74cdaa449f3114356"
 [[package]]
 name = "appit"
 version = "0.3.2"
-source = "git+https://github.com/khonsulabs/appit#331bfdd3534a2f6a7c44f24017b4d52aee40da5b"
+source = "git+https://github.com/khonsulabs/appit#68530e7d69713ca2c5fc1d7003debe0ba616a50b"
 dependencies = [
  "winit",
 ]
@@ -1253,9 +1253,9 @@ checksum = "78ca9ab1a0babb1e7d5695e3530886289c18cf2f87ec19a575a0abdce112e3a3"
 
 [[package]]
 name = "memmap2"
-version = "0.9.4"
+version = "0.9.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fe751422e4a8caa417e13c3ea66452215d7d63e19e604f4980461212f3ae1322"
+checksum = "fd3f7eed9d3848f8b98834af67102b720745c4ec028fcd0aa0239277e7de374f"
 dependencies = [
  "libc",
 ]
@@ -2615,9 +2615,9 @@ checksum = "ad8d71f5726e5f285a935e9fe8edfd53f0491eb6e9a5774097fdabee7cd8c9cd"
 
 [[package]]
 name = "unicode-segmentation"
-version = "1.11.0"
+version = "1.12.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d4c87d22b6e3f4a18d4d40ef354e97c90fcb14dd91d7dc0aa9d8a1172ebf7202"
+checksum = "f6ccf251212114b54433ec949fd6a7841275f9ada20dddd2f29e9ceea4501493"
 
 [[package]]
 name = "unicode-width"
diff --git a/src/app.rs b/src/app.rs
index 9963e5924..7b1b292ef 100644
--- a/src/app.rs
+++ b/src/app.rs
@@ -509,6 +509,10 @@ where
         NonZeroU32::new(4).assert("4 is less than u32::MAX")
     }
 
+    /// Executed once after the window has been fully initialized.
+    #[allow(unused_variables)]
+    fn initialized(&mut self, window: Window<'_, WindowEvent>, kludgine: &mut Kludgine) {}
+
     /// Prepare the window to render.
     ///
     /// This is called directly before [`render()`](Self::render()) and is a
@@ -1299,6 +1303,17 @@ where
         }
     }
 
+    fn initialized(&mut self, window: &mut RunningWindow<AppEvent<User>>) {
+        self.behavior.initialized(
+            Window::new(
+                window,
+                self.last_render.elapsed(),
+                self.last_render_duration,
+            ),
+            &mut self.kludgine,
+        );
+    }
+
     fn redraw(&mut self, window: &mut RunningWindow<AppEvent<User>>) {
         if self.config.width > 0 && self.config.height > 0 {
             let Some(surface) = self.current_surface_texture(window) else {