diff --git a/.github/docker/rez-win-base/Dockerfile b/.github/docker/rez-win-base/Dockerfile
index 862f185cd8..a1022a8c0f 100644
--- a/.github/docker/rez-win-base/Dockerfile
+++ b/.github/docker/rez-win-base/Dockerfile
@@ -29,4 +29,11 @@ RUN iex ((new-object net.webclient).DownloadString('https://chocolatey.org/insta
     choco install cmake --yes --version=${ENV:CMAKE_VERSION} --installargs 'ADD_CMAKE_TO_PATH=System'; `
     choco install pwsh --yes --version=${PWSH_VERSION};
 
+# ------------------------------------------------------------------------------------------------------------
+# Reduce image size
+#
+RUN choco install --yes choco-cleaner;                    `
+    C:\ProgramData\chocolatey\bin\choco-cleaner.ps1;      `
+    choco uninstall --yes choco-cleaner
+
 ENTRYPOINT ["powershell.exe", "-NoLogo", "-ExecutionPolicy", "ByPass"]
diff --git a/.github/docker/rez-win-py/Dockerfile b/.github/docker/rez-win-py/Dockerfile
index a3b3c25597..628c3c8758 100644
--- a/.github/docker/rez-win-py/Dockerfile
+++ b/.github/docker/rez-win-py/Dockerfile
@@ -43,6 +43,13 @@ RUN $python_relative_ver = (& python --version 2>&1).ToString().Trim().Split(" "
     $python_explicit_ver = (& C:\python\python.exe --version 2>&1).ToString().Trim().Split(" ")[1];                         `
     if (-not ($python_explicit_ver -eq $python_relative_ver -and $python_explicit_ver -eq ${ENV:PYTHON_VERSION})) {exit 1};
 
+# ------------------------------------------------------------------------------------------------------------
+# Reduce image size
+#
+RUN choco install --yes choco-cleaner;                    `
+    C:\ProgramData\chocolatey\bin\choco-cleaner.ps1;      `
+    choco uninstall --yes choco-cleaner
+
 COPY entrypoint.ps1 /entrypoint.ps1
 
 ENTRYPOINT ["powershell.exe", "-NoLogo", "-ExecutionPolicy", "ByPass", "-File", "/entrypoint.ps1"]