diff --git a/example/custom-delims/composition.yaml b/example/custom-delims/composition.yaml
new file mode 100644
index 0000000..76b4fad
--- /dev/null
+++ b/example/custom-delims/composition.yaml
@@ -0,0 +1,68 @@
+apiVersion: apiextensions.crossplane.io/v1
+kind: Composition
+metadata:
+  name: example-inline
+spec:
+  compositeTypeRef:
+    apiVersion: example.crossplane.io/v1beta1
+    kind: XR
+  mode: Pipeline
+  pipeline:
+    - step: render-templates
+      functionRef:
+        name: function-go-templating
+      input:
+        apiVersion: gotemplating.fn.crossplane.io/v1beta1
+        kind: GoTemplate
+        leftDelims: '[['
+        rightDelims: ']]'
+        source: Inline
+        inline:
+          template: |
+            [[- range $i := until ( .observed.composite.resource.spec.count | int ) ]]
+            ---
+            apiVersion: iam.aws.upbound.io/v1beta1
+            kind: User
+            metadata:
+              annotations:
+                gotemplating.fn.crossplane.io/composition-resource-name: test-user-[[ $i ]]
+              labels:
+                testing.upbound.io/example-name: test-user-[[ $i ]]
+              [[ if eq $.observed.resources nil ]]
+                dummy: [[ randomChoice "foo" "bar" "baz" ]]
+              [[ else ]]
+                dummy: [[ ( index $.observed.resources ( print "test-user-" $i ) ).resource.metadata.labels.dummy ]]
+              [[ end ]]
+            spec:
+              forProvider: {}
+            ---
+            apiVersion: iam.aws.upbound.io/v1beta1
+            kind: AccessKey
+            metadata:
+              annotations:
+                  gotemplating.fn.crossplane.io/composition-resource-name: sample-access-key-[[ $i ]]
+            spec:
+              forProvider:
+                userSelector:
+                  matchLabels:
+                    testing.upbound.io/example-name: test-user-[[ $i ]]
+              writeConnectionSecretToRef:
+                name: sample-access-key-secret-[[ $i ]]
+                namespace: crossplane-system
+            [[- end ]]
+            ---
+            apiVersion: meta.gotemplating.fn.crossplane.io/v1alpha1
+            kind: CompositeConnectionDetails
+            [[ if eq $.observed.resources nil ]]
+            data: {}
+            [[ else ]]
+            data:
+              username: [[ ( index $.observed.resources "sample-access-key-0" ).connectionDetails.username ]]
+              password: [[ ( index $.observed.resources "sample-access-key-0" ).connectionDetails.password ]]
+              url: [[ "http://www.example.com" | b64enc ]]
+            [[ end ]]
+            ---
+            apiVersion: example.crossplane.io/v1beta1
+            kind: XR
+            status:
+              dummy: cool-status
diff --git a/example/custom-delims/functions.yaml b/example/custom-delims/functions.yaml
new file mode 100644
index 0000000..4247bb8
--- /dev/null
+++ b/example/custom-delims/functions.yaml
@@ -0,0 +1,6 @@
+apiVersion: pkg.crossplane.io/v1beta1
+kind: Function
+metadata:
+  name: function-go-templating
+spec:
+  package: xpkg.upbound.io/crossplane-contrib/function-go-templating:v0.0.0-20231101231317-cdb49945da4e
\ No newline at end of file
diff --git a/example/custom-delims/xr.yaml b/example/custom-delims/xr.yaml
new file mode 100644
index 0000000..27cae0a
--- /dev/null
+++ b/example/custom-delims/xr.yaml
@@ -0,0 +1,6 @@
+apiVersion: example.crossplane.io/v1beta1
+kind: XR
+metadata:
+  name: example
+spec:
+  count: 2
diff --git a/function_maps.go b/function_maps.go
index f5f1a6c..67ab840 100644
--- a/function_maps.go
+++ b/function_maps.go
@@ -9,6 +9,11 @@ import (
 	"github.com/crossplane-contrib/function-go-templating/input/v1beta1"
 )
 
+var (
+	defaultLeftDelims  = "{{"
+	defaultRightDelims = "}}"
+)
+
 var funcMaps = []template.FuncMap{
 	{
 		"randomChoice": func(choices ...string) string {
@@ -20,13 +25,13 @@ var funcMaps = []template.FuncMap{
 }
 
 func GetNewTemplateWithFunctionMaps(in *v1beta1.GoTemplate) *template.Template {
-	if in.LeftDelims == "" {
-		in.LeftDelims = "{{"
+	if in.LeftDelims == nil {
+		in.LeftDelims = &defaultLeftDelims
 	}
-	if in.RightDelims == "" {
-		in.RightDelims = "}}"
+	if in.RightDelims == nil {
+		in.RightDelims = &defaultRightDelims
 	}
-	tpl := template.New("manifests").Delims(in.LeftDelims, in.RightDelims)
+	tpl := template.New("manifests").Delims(*in.LeftDelims, *in.RightDelims)
 
 	for _, f := range funcMaps {
 		tpl.Funcs(f)
diff --git a/input/v1beta1/input.go b/input/v1beta1/input.go
index d335fed..310db95 100644
--- a/input/v1beta1/input.go
+++ b/input/v1beta1/input.go
@@ -20,9 +20,13 @@ type GoTemplate struct {
 	metav1.ObjectMeta `json:"metadata,omitempty"`
 
 	// Template start characters
-	LeftDelims string `json:"leftDelims,omitempty"`
+	// +kubebuilder:default:="{{"
+	// +optional
+	LeftDelims *string `json:"leftDelims,omitempty"`
 	// Template end characters
-	RightDelims string `json:"rightDelims,omitempty"`
+	// +kubebuilder:default:="}}"
+	// +optional
+	RightDelims *string `json:"rightDelims,omitempty"`
 	// Source specifies the different types of input sources that can be used with this function
 	Source TemplateSource `json:"source"`
 	// Inline is the inline form input of the templates
diff --git a/input/v1beta1/zz_generated.deepcopy.go b/input/v1beta1/zz_generated.deepcopy.go
index 40947fc..098984a 100644
--- a/input/v1beta1/zz_generated.deepcopy.go
+++ b/input/v1beta1/zz_generated.deepcopy.go
@@ -13,6 +13,16 @@ func (in *GoTemplate) DeepCopyInto(out *GoTemplate) {
 	*out = *in
 	out.TypeMeta = in.TypeMeta
 	in.ObjectMeta.DeepCopyInto(&out.ObjectMeta)
+	if in.LeftDelims != nil {
+		in, out := &in.LeftDelims, &out.LeftDelims
+		*out = new(string)
+		**out = **in
+	}
+	if in.RightDelims != nil {
+		in, out := &in.RightDelims, &out.RightDelims
+		*out = new(string)
+		**out = **in
+	}
 	if in.Inline != nil {
 		in, out := &in.Inline, &out.Inline
 		*out = new(TemplateSourceInline)
diff --git a/package/input/gotemplating.fn.crossplane.io_gotemplates.yaml b/package/input/gotemplating.fn.crossplane.io_gotemplates.yaml
index 215395f..4f20615 100644
--- a/package/input/gotemplating.fn.crossplane.io_gotemplates.yaml
+++ b/package/input/gotemplating.fn.crossplane.io_gotemplates.yaml
@@ -44,11 +44,13 @@ spec:
               submits requests to. Cannot be updated. In CamelCase. More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#types-kinds'
             type: string
           leftDelims:
+            default: '{{'
             description: Template start characters
             type: string
           metadata:
             type: object
           rightDelims:
+            default: '}}'
             description: Template end characters
             type: string
           source: