diff --git a/.changeset/stupid-mice-dream.md b/.changeset/stupid-mice-dream.md
new file mode 100644
index 0000000000..17d2609585
--- /dev/null
+++ b/.changeset/stupid-mice-dream.md
@@ -0,0 +1,5 @@
+---
+'@backstage/core-components': patch
+---
+
+Add Missing Overridable Components Type for SidebarSpace, SidebarSpacer, and SidebarDivider Components.
diff --git a/packages/core-components/src/layout/Sidebar/Items.tsx b/packages/core-components/src/layout/Sidebar/Items.tsx
index c8c6db13a2..dac35bd3a7 100644
--- a/packages/core-components/src/layout/Sidebar/Items.tsx
+++ b/packages/core-components/src/layout/Sidebar/Items.tsx
@@ -548,6 +548,8 @@ export function SidebarSearchField(props: SidebarSearchFieldProps) {
   );
 }
 
+export type SidebarSpaceClassKey = 'root';
+
 export const SidebarSpace = styled('div')(
   {
     flex: 1,
@@ -555,6 +557,8 @@ export const SidebarSpace = styled('div')(
   { name: 'BackstageSidebarSpace' },
 );
 
+export type SidebarSpacerClassKey = 'root';
+
 export const SidebarSpacer = styled('div')(
   {
     height: 8,
@@ -562,6 +566,8 @@ export const SidebarSpacer = styled('div')(
   { name: 'BackstageSidebarSpacer' },
 );
 
+export type SidebarDividerClassKey = 'root';
+
 export const SidebarDivider = styled('hr')(
   {
     height: 1,
diff --git a/packages/core-components/src/layout/Sidebar/index.ts b/packages/core-components/src/layout/Sidebar/index.ts
index 79a86023ee..3d922f1322 100644
--- a/packages/core-components/src/layout/Sidebar/index.ts
+++ b/packages/core-components/src/layout/Sidebar/index.ts
@@ -33,7 +33,12 @@ export {
   SidebarSpacer,
   SidebarScrollWrapper,
 } from './Items';
-export type { SidebarItemClassKey } from './Items';
+export type {
+  SidebarItemClassKey,
+  SidebarSpaceClassKey,
+  SidebarSpacerClassKey,
+  SidebarDividerClassKey,
+} from './Items';
 export { IntroCard, SidebarIntro } from './Intro';
 export type { SidebarIntroClassKey } from './Intro';
 export {
diff --git a/packages/core-components/src/overridableComponents.ts b/packages/core-components/src/overridableComponents.ts
index 98b8f83abd..c53c47da1b 100644
--- a/packages/core-components/src/overridableComponents.ts
+++ b/packages/core-components/src/overridableComponents.ts
@@ -83,6 +83,9 @@ import {
   ItemCardHeaderClassKey,
   PageClassKey,
   SidebarClassKey,
+  SidebarSpaceClassKey,
+  SidebarSpacerClassKey,
+  SidebarDividerClassKey,
   SidebarIntroClassKey,
   SidebarItemClassKey,
   SidebarPageClassKey,
@@ -157,6 +160,9 @@ type BackstageComponentsNameToClassKey = {
   BackstageItemCardHeader: ItemCardHeaderClassKey;
   BackstagePage: PageClassKey;
   BackstageSidebar: SidebarClassKey;
+  BackstageSidebarSpace: SidebarSpaceClassKey;
+  BackstageSidebarSpacer: SidebarSpacerClassKey;
+  BackstageSidebarDivider: SidebarDividerClassKey;
   BackstageSidebarIntro: SidebarIntroClassKey;
   BackstageSidebarItem: SidebarItemClassKey;
   BackstageSidebarPage: SidebarPageClassKey;