diff --git a/src/Aspire.Hosting/Dcp/ContainerCreator.cs b/src/Aspire.Hosting/Dcp/ContainerCreator.cs
index fe377d8bef6..2219babcb54 100644
--- a/src/Aspire.Hosting/Dcp/ContainerCreator.cs
+++ b/src/Aspire.Hosting/Dcp/ContainerCreator.cs
@@ -10,6 +10,7 @@
 using System.Net.Sockets;
 using Aspire.Hosting.ApplicationModel;
 using Aspire.Hosting.Dcp.Model;
+using Aspire.Hosting.Publishing;
 using Aspire.Hosting.Utils;
 using Microsoft.Extensions.Configuration;
 using Microsoft.Extensions.Hosting;
@@ -260,7 +261,7 @@ private async Task BuildAndCreateContainerAsync(RenderedModelResource<Container>
         var dcpContainer = cr.DcpResource;
         var modelContainer = cr.ModelResource;
 
-        await ApplyBuildArgumentsAsync(dcpContainer, cr.ModelResource, _executionContext.ServiceProvider, cToken).ConfigureAwait(false);
+        await ApplyBuildArgumentsAsync(dcpContainer, cr.ModelResource, _executionContext.ServiceProvider, logger, cToken).ConfigureAwait(false);
 
         var spec = dcpContainer.Spec;
 
@@ -732,7 +733,7 @@ await modelResource.ProcessContainerRuntimeArgValues(
         return (runArgs, failedToApplyArgs);
     }
 
-    private static async Task ApplyBuildArgumentsAsync(Container dcpContainerResource, IResource modelContainerResource, IServiceProvider serviceProvider, CancellationToken cancellationToken)
+    private static async Task ApplyBuildArgumentsAsync(Container dcpContainerResource, IResource modelContainerResource, IServiceProvider serviceProvider, ILogger logger, CancellationToken cancellationToken)
     {
         if (modelContainerResource.Annotations.OfType<DockerfileBuildAnnotation>().SingleOrDefault() is { } dockerfileBuildAnnotation)
         {
@@ -783,6 +784,18 @@ private static async Task ApplyBuildArgumentsAsync(Container dcpContainerResourc
                 Args = dcpBuildArgs,
                 Secrets = dcpBuildSecrets
             };
+
+#pragma warning disable ASPIREPIPELINES003 // ContainerBuildOptions APIs are experimental.
+            var buildOptionsContext = await modelContainerResource.ProcessContainerBuildOptionsCallbackAsync(
+                serviceProvider,
+                logger,
+                cancellationToken: cancellationToken).ConfigureAwait(false);
+
+            if (buildOptionsContext.TargetPlatform is { } targetPlatform)
+            {
+                dcpContainerResource.Spec.Build.Platform = targetPlatform.ToRuntimePlatformString();
+            }
+#pragma warning restore ASPIREPIPELINES003
         }
     }
 
diff --git a/src/Aspire.Hosting/Dcp/Model/Container.cs b/src/Aspire.Hosting/Dcp/Model/Container.cs
index 7a9279632f7..80be74cb549 100644
--- a/src/Aspire.Hosting/Dcp/Model/Container.cs
+++ b/src/Aspire.Hosting/Dcp/Model/Container.cs
@@ -126,6 +126,10 @@ internal sealed class BuildContext
     // Optional labels to apply to the built image
     [JsonPropertyName("labels")]
     public List<ContainerLabel>? Labels { get; set; }
+
+    // Optional target platform for the build (e.g. "linux/amd64")
+    [JsonPropertyName("platform")]
+    public string? Platform { get; set; }
 }
 
 internal sealed class BuildContextSecret
diff --git a/tests/Aspire.Hosting.Tests/Dcp/DcpExecutorTests.cs b/tests/Aspire.Hosting.Tests/Dcp/DcpExecutorTests.cs
index 0dee41d64fe..230ecc826e7 100644
--- a/tests/Aspire.Hosting.Tests/Dcp/DcpExecutorTests.cs
+++ b/tests/Aspire.Hosting.Tests/Dcp/DcpExecutorTests.cs
@@ -12,6 +12,7 @@
 using Aspire.Dashboard.Model;
 using Aspire.Hosting.Dcp;
 using Aspire.Hosting.Dcp.Model;
+using Aspire.Hosting.Publishing;
 using Aspire.Hosting.Tests.Utils;
 using k8s.Models;
 using Microsoft.AspNetCore.InternalTesting;
@@ -51,6 +52,31 @@ public async Task ContainersArePassedOtelServiceName()
         Assert.Equal("CustomName", container.Metadata.Annotations["otel-service-name"]);
     }
 
+    [Fact]
+    public async Task DockerfileContainerBuildSpecIncludesPlatform()
+    {
+        using var tempDockerfileContext = await DockerfileUtils.CreateTemporaryDockerfileAsync();
+
+        var builder = DistributedApplication.CreateBuilder();
+#pragma warning disable ASPIREPIPELINES003 // ContainerBuildOptions APIs are experimental.
+        builder.AddDockerfile("mycontainer", tempDockerfileContext.ContextPath, tempDockerfileContext.DockerfilePath)
+               .WithContainerBuildOptions(ctx => ctx.TargetPlatform = ContainerTargetPlatform.LinuxArm64);
+#pragma warning restore ASPIREPIPELINES003
+
+        var kubernetesService = new TestKubernetesService();
+
+        using var app = builder.Build();
+        var distributedAppModel = app.Services.GetRequiredService<DistributedApplicationModel>();
+
+        var appExecutor = CreateAppExecutor(distributedAppModel, kubernetesService: kubernetesService);
+
+        await appExecutor.RunApplicationAsync();
+
+        var container = Assert.Single(kubernetesService.CreatedResources.OfType<Container>());
+        Assert.NotNull(container.Spec.Build);
+        Assert.Equal("linux/arm64", container.Spec.Build!.Platform);
+    }
+
     [Fact]
     public async Task ResourceStarted_ProjectHasReplicas_EventRaisedOnce()
     {