diff --git a/docs/variables.md b/docs/variables.md
index 3d1f95830d9..4d4ef6f5c6d 100644
--- a/docs/variables.md
+++ b/docs/variables.md
@@ -15,6 +15,7 @@ This page documents the variable substitions supported by `Tasks` and `Pipelines
 | `params.<param name>` | The value of the parameter at runtime. |
 | `tasks.<taskName>.results.<resultName>` | The value of the `Task's` result. Can alter `Task` execution order within a `Pipeline`.) |
 | `context.pipelineRun.name` | The name of the `PipelineRun` that this `Pipeline` is running in. |
+| `context.pipelineRun.namespace` | The namespace of the `PipelineRun` that this `Pipeline` is running in. |
 | `context.pipeline.name` | The name of this `Pipeline` . |
 
 
@@ -31,6 +32,7 @@ This page documents the variable substitions supported by `Tasks` and `Pipelines
 | `workspaces.<workspaceName>.volume` | The name of the volume populating the `Workspace`. |
 | `credentials.path` | The path to credentials injected from Secrets with matching annotations. |
 | `context.taskRun.name` | The name of the `TaskRun` that this `Task` is running in. |
+| `context.taskRun.namespace` | The namespace of the `TaskRun` that this `Task` is running in. |
 | `context.task.name` | The name of this `Task`. |
 
 ### `PipelineResource` variables available in a `Task`
diff --git a/pkg/reconciler/pipelinerun/resources/apply.go b/pkg/reconciler/pipelinerun/resources/apply.go
index 33cb61e83c2..4962f727b05 100644
--- a/pkg/reconciler/pipelinerun/resources/apply.go
+++ b/pkg/reconciler/pipelinerun/resources/apply.go
@@ -56,12 +56,10 @@ func ApplyParameters(p *v1beta1.PipelineSpec, pr *v1beta1.PipelineRun) *v1beta1.
 // ApplyContexts applies the substitution from $(context.(pipelineRun|pipeline).*) with the specified values.
 // Currently supports only name substitution. Uses "" as a default if name is not specified.
 func ApplyContexts(spec *v1beta1.PipelineSpec, pipelineName string, pr *v1beta1.PipelineRun) *v1beta1.PipelineSpec {
-	stringReplacements := map[string]string{}
-	stringReplacements["context.pipelineRun.name"] = pr.Name
-	stringReplacements["context.pipeline.name"] = pipelineName
-
 	return ApplyReplacements(spec,
-		map[string]string{"context.pipelineRun.name": pr.Name, "context.pipeline.name": pipelineName},
+		map[string]string{"context.pipelineRun.name": pr.Name,
+			"context.pipeline.name":         pipelineName,
+			"context.pipelineRun.namespace": pr.Namespace},
 		map[string][]string{})
 }
 
diff --git a/pkg/reconciler/pipelinerun/resources/apply_test.go b/pkg/reconciler/pipelinerun/resources/apply_test.go
index bac752218ab..003b5beef6b 100644
--- a/pkg/reconciler/pipelinerun/resources/apply_test.go
+++ b/pkg/reconciler/pipelinerun/resources/apply_test.go
@@ -451,6 +451,19 @@ func TestContext(t *testing.T) {
 				tb.PipelineTask("first-task-1", "first-task",
 					tb.PipelineTaskParam("first-task-first-param", "pipelineRunName-1"),
 				))),
+	}, {
+		description: "context pipelineRunNameNamespace replacement with defined pipelineRunNamepsace in spec",
+		pr:          tb.PipelineRun("pipelineRunName", tb.PipelineRunNamespace("prns")),
+		original: tb.Pipeline("test-pipeline",
+			tb.PipelineSpec(
+				tb.PipelineTask("first-task-1", "first-task",
+					tb.PipelineTaskParam("first-task-first-param", "$(context.pipelineRun.namespace)-1"),
+				))),
+		expected: tb.Pipeline("test-pipeline",
+			tb.PipelineSpec(
+				tb.PipelineTask("first-task-1", "first-task",
+					tb.PipelineTaskParam("first-task-first-param", "prns-1"),
+				))),
 	}, {
 		description: "context pipelineRunName replacement with no defined pipeline in spec",
 		pr:          &v1beta1.PipelineRun{},
@@ -464,6 +477,19 @@ func TestContext(t *testing.T) {
 				tb.PipelineTask("first-task-1", "first-task",
 					tb.PipelineTaskParam("first-task-first-param", "-1"),
 				))),
+	}, {
+		description: "context pipelineRunNamespace replacement with no defined pipelineRunNamespace in spec",
+		pr:          tb.PipelineRun("pipelineRunName"),
+		original: tb.Pipeline("test-pipeline",
+			tb.PipelineSpec(
+				tb.PipelineTask("first-task-1", "first-task",
+					tb.PipelineTaskParam("first-task-first-param", "$(context.pipelineRun.namespace)-1"),
+				))),
+		expected: tb.Pipeline("test-pipeline",
+			tb.PipelineSpec(
+				tb.PipelineTask("first-task-1", "first-task",
+					tb.PipelineTaskParam("first-task-first-param", "-1"),
+				))),
 	}} {
 		t.Run(tc.description, func(t *testing.T) {
 			got := ApplyContexts(&tc.original.Spec, tc.original.Name, tc.pr)
diff --git a/pkg/reconciler/taskrun/resources/apply.go b/pkg/reconciler/taskrun/resources/apply.go
index 8d2e5828c57..e8706acfb69 100644
--- a/pkg/reconciler/taskrun/resources/apply.go
+++ b/pkg/reconciler/taskrun/resources/apply.go
@@ -99,12 +99,8 @@ func ApplyResources(spec *v1beta1.TaskSpec, resolvedResources map[string]v1beta1
 // ApplyContexts applies the substitution from $(context.(taskRun|task).*) with the specified values.
 // Currently supports only name substitution. Uses "" as a default if name is not specified.
 func ApplyContexts(spec *v1beta1.TaskSpec, rtr *ResolvedTaskResources, tr *v1beta1.TaskRun) *v1beta1.TaskSpec {
-	stringReplacements := map[string]string{}
-	stringReplacements["context.taskRun.name"] = tr.Name
-	stringReplacements["context.task.name"] = rtr.TaskName
-
 	return ApplyReplacements(spec,
-		map[string]string{"context.taskRun.name": tr.Name, "context.task.name": rtr.TaskName},
+		map[string]string{"context.taskRun.name": tr.Name, "context.task.name": rtr.TaskName, "context.taskRun.namespace": tr.Namespace},
 		map[string][]string{})
 }
 
diff --git a/pkg/reconciler/taskrun/resources/apply_test.go b/pkg/reconciler/taskrun/resources/apply_test.go
index 6d44575d457..e30587b0013 100644
--- a/pkg/reconciler/taskrun/resources/apply_test.go
+++ b/pkg/reconciler/taskrun/resources/apply_test.go
@@ -839,7 +839,7 @@ func TestContext(t *testing.T) {
 			}},
 		},
 	}, {
-		description: "context taskRunName replacement with no defined taskRun in spec container",
+		description: "context taskRunName replacement with no defined taskRun name in spec container",
 		rtr: resources.ResolvedTaskResources{
 			TaskName: "Task1",
 		},
@@ -860,6 +860,55 @@ func TestContext(t *testing.T) {
 				},
 			}},
 		},
+	}, {
+		description: "context taskRun namespace replacement with no defined namepsace in spec container",
+		rtr: resources.ResolvedTaskResources{
+			TaskName: "Task1",
+		},
+		tr: v1beta1.TaskRun{},
+		spec: v1beta1.TaskSpec{
+			Steps: []v1beta1.Step{{
+				Container: corev1.Container{
+					Name:  "ImageName",
+					Image: "$(context.taskRun.namespace)-1",
+				},
+			}},
+		},
+		want: v1beta1.TaskSpec{
+			Steps: []v1beta1.Step{{
+				Container: corev1.Container{
+					Name:  "ImageName",
+					Image: "-1",
+				},
+			}},
+		},
+	}, {
+		description: "context taskRun namespace replacement with defined namepsace in spec container",
+		rtr: resources.ResolvedTaskResources{
+			TaskName: "Task1",
+		},
+		tr: v1beta1.TaskRun{
+			ObjectMeta: metav1.ObjectMeta{
+				Name:      "taskrunName",
+				Namespace: "trNamespace",
+			},
+		},
+		spec: v1beta1.TaskSpec{
+			Steps: []v1beta1.Step{{
+				Container: corev1.Container{
+					Name:  "ImageName",
+					Image: "$(context.taskRun.namespace)-1",
+				},
+			}},
+		},
+		want: v1beta1.TaskSpec{
+			Steps: []v1beta1.Step{{
+				Container: corev1.Container{
+					Name:  "ImageName",
+					Image: "trNamespace-1",
+				},
+			}},
+		},
 	}, {
 		description: "context taskRunName replacement with no defined taskName in spec container",
 		rtr:         resources.ResolvedTaskResources{},