diff --git a/packages/react-native/Libraries/Utilities/Platform.android.js b/packages/react-native/Libraries/Utilities/Platform.android.js
index e2cfdf8aa64..756fd50dcf6 100644
--- a/packages/react-native/Libraries/Utilities/Platform.android.js
+++ b/packages/react-native/Libraries/Utilities/Platform.android.js
@@ -31,7 +31,7 @@ const Platform: PlatformType = {
       major: number,
       minor: number,
       patch: number,
-      prerelease: ?number,
+      prerelease: ?string,
     |},
     Version: number,
     Release: string,
diff --git a/packages/react-native/Libraries/Utilities/Platform.d.ts b/packages/react-native/Libraries/Utilities/Platform.d.ts
index 82246df0ffb..7f7dc61c104 100644
--- a/packages/react-native/Libraries/Utilities/Platform.d.ts
+++ b/packages/react-native/Libraries/Utilities/Platform.d.ts
@@ -24,7 +24,7 @@ type PlatformConstants = {
     major: number;
     minor: number;
     patch: number;
-    prerelease?: number | null | undefined;
+    prerelease?: string | null | undefined;
   };
 };
 interface PlatformStatic {
diff --git a/packages/react-native/Libraries/Utilities/Platform.flow.js b/packages/react-native/Libraries/Utilities/Platform.flow.js
index cfd7bbc71f8..b8a12d86524 100644
--- a/packages/react-native/Libraries/Utilities/Platform.flow.js
+++ b/packages/react-native/Libraries/Utilities/Platform.flow.js
@@ -32,7 +32,7 @@ type IOSPlatform = {
       major: number,
       minor: number,
       patch: number,
-      prerelease: ?number,
+      prerelease: ?string,
     |},
     systemName: string,
     isMacCatalyst?: boolean,
@@ -65,7 +65,7 @@ type AndroidPlatform = {
       major: number,
       minor: number,
       patch: number,
-      prerelease: ?number,
+      prerelease: ?string,
     |},
     Version: number,
     Release: string,
diff --git a/packages/react-native/Libraries/Utilities/Platform.ios.js b/packages/react-native/Libraries/Utilities/Platform.ios.js
index 1fa1b83ab44..a26a50f7946 100644
--- a/packages/react-native/Libraries/Utilities/Platform.ios.js
+++ b/packages/react-native/Libraries/Utilities/Platform.ios.js
@@ -34,7 +34,7 @@ const Platform: PlatformType = {
       major: number,
       minor: number,
       patch: number,
-      prerelease: ?number,
+      prerelease: ?string,
     |},
     systemName: string,
     isMacCatalyst?: boolean,
diff --git a/packages/react-native/Libraries/__tests__/__snapshots__/public-api-test.js.snap b/packages/react-native/Libraries/__tests__/__snapshots__/public-api-test.js.snap
index 2ea05e0ad30..7e45f5932d2 100644
--- a/packages/react-native/Libraries/__tests__/__snapshots__/public-api-test.js.snap
+++ b/packages/react-native/Libraries/__tests__/__snapshots__/public-api-test.js.snap
@@ -8741,7 +8741,7 @@ type IOSPlatform = {
       major: number,
       minor: number,
       patch: number,
-      prerelease: ?number,
+      prerelease: ?string,
     |},
     systemName: string,
     isMacCatalyst?: boolean,
@@ -8765,7 +8765,7 @@ type AndroidPlatform = {
       major: number,
       minor: number,
       patch: number,
-      prerelease: ?number,
+      prerelease: ?string,
     |},
     Version: number,
     Release: string,
diff --git a/packages/react-native/React/Base/RCTVersion.m b/packages/react-native/React/Base/RCTVersion.m
index 69ce4f75320..5e18b567a8a 100644
--- a/packages/react-native/React/Base/RCTVersion.m
+++ b/packages/react-native/React/Base/RCTVersion.m
@@ -24,7 +24,7 @@ NSDictionary* RCTGetReactNativeVersion(void)
                   RCTVersionMajor: @(1000),
                   RCTVersionMinor: @(0),
                   RCTVersionPatch: @(0),
-                  RCTVersionPrerelease: [NSNull null],
+                  RCTVersionPrerelease: @"alpha.0",
                   };
   });
   return __rnVersion;
diff --git a/packages/react-native/React/CoreModules/RCTPlatform.mm b/packages/react-native/React/CoreModules/RCTPlatform.mm
index f357100b71e..ec8a5f3220e 100644
--- a/packages/react-native/React/CoreModules/RCTPlatform.mm
+++ b/packages/react-native/React/CoreModules/RCTPlatform.mm
@@ -78,9 +78,7 @@ RCT_EXPORT_MODULE(PlatformConstants)
             {.minor = [versions[@"minor"] doubleValue],
              .major = [versions[@"major"] doubleValue],
              .patch = [versions[@"patch"] doubleValue],
-             .prerelease = [versions[@"prerelease"] isKindOfClass:[NSNull class]]
-                 ? std::optional<double>{}
-                 : [versions[@"prerelease"] doubleValue]}),
+             .prerelease = [versions[@"prerelease"] isKindOfClass:[NSNull class]] ? nullptr : versions[@"prerelease"]}),
 #if TARGET_OS_MACCATALYST
         .isMacCatalyst = true,
 #else
diff --git a/packages/react-native/React/DevSupport/RCTInspectorUtils.mm b/packages/react-native/React/DevSupport/RCTInspectorUtils.mm
index 70a4facb09b..099bc32b689 100644
--- a/packages/react-native/React/DevSupport/RCTInspectorUtils.mm
+++ b/packages/react-native/React/DevSupport/RCTInspectorUtils.mm
@@ -27,14 +27,13 @@
   metadata.appIdentifier = [[NSBundle mainBundle] bundleIdentifier];
   metadata.platform = RCTPlatformName;
   metadata.deviceName = [device name];
-  metadata.reactNativeVersion =
-      [NSString stringWithFormat:@"%i.%i.%i%@",
-                                 [version[@"major"] intValue],
-                                 [version[@"minor"] intValue],
-                                 [version[@"patch"] intValue],
-                                 [version[@"prerelease"] isKindOfClass:[NSNull class]]
-                                     ? @""
-                                     : [@"-" stringByAppendingString:[version[@"prerelease"] stringValue]]];
+  metadata.reactNativeVersion = [NSString stringWithFormat:@"%i.%i.%i%@",
+                                                           [version[@"major"] intValue],
+                                                           [version[@"minor"] intValue],
+                                                           [version[@"patch"] intValue],
+                                                           [version[@"prerelease"] isKindOfClass:[NSNull class]]
+                                                               ? @""
+                                                               : [@"-" stringByAppendingString:version[@"prerelease"]]];
 
   return metadata;
 }
diff --git a/packages/react-native/src/private/specs/modules/NativePlatformConstantsAndroid.js b/packages/react-native/src/private/specs/modules/NativePlatformConstantsAndroid.js
index eb9e86100f4..c68afa54f50 100644
--- a/packages/react-native/src/private/specs/modules/NativePlatformConstantsAndroid.js
+++ b/packages/react-native/src/private/specs/modules/NativePlatformConstantsAndroid.js
@@ -16,7 +16,7 @@ export type ReactNativeVersionAndroid = {|
   major: number,
   minor: number,
   patch: number,
-  prerelease: ?number,
+  prerelease: ?string,
 |};
 
 export type PlatformConstantsAndroid = {|
diff --git a/packages/react-native/src/private/specs/modules/NativePlatformConstantsIOS.js b/packages/react-native/src/private/specs/modules/NativePlatformConstantsIOS.js
index b65cfc96b33..f35b991b2e5 100644
--- a/packages/react-native/src/private/specs/modules/NativePlatformConstantsIOS.js
+++ b/packages/react-native/src/private/specs/modules/NativePlatformConstantsIOS.js
@@ -19,7 +19,7 @@ export type PlatformConstantsIOS = {|
     major: number,
     minor: number,
     patch: number,
-    prerelease: ?number,
+    prerelease: ?string,
   |},
   forceTouchAvailable: boolean,
   osVersion: string,