diff --git a/pkg/graph/constructor.go b/pkg/graph/constructor.go
index 2fc6fb4e0d4..7e5430d7814 100644
--- a/pkg/graph/constructor.go
+++ b/pkg/graph/constructor.go
@@ -17,6 +17,8 @@ limitations under the License.
 package graph
 
 import (
+	"fmt"
+
 	eventingv1 "knative.dev/eventing/pkg/apis/eventing/v1"
 	messagingv1 "knative.dev/eventing/pkg/apis/messaging/v1"
 	duckv1 "knative.dev/pkg/apis/duck/v1"
@@ -94,3 +96,53 @@ func (g *Graph) AddChannel(channel messagingv1.Channel) {
 
 	v.AddEdge(to, dest, NoTransform)
 }
+
+func (g *Graph) AddTrigger(trigger eventingv1.Trigger) error {
+	brokerRef := &duckv1.KReference{
+		Name:       trigger.Spec.Broker,
+		Namespace:  trigger.Namespace,
+		APIVersion: "eventing.knative.dev/v1",
+		Kind:       "Broker",
+	}
+	brokerDest := &duckv1.Destination{Ref: brokerRef}
+	broker, ok := g.vertices[makeComparableDestination(brokerDest)]
+	if !ok {
+		return fmt.Errorf("trigger refers to a non existent broker, can't add it to the graph")
+	}
+
+	triggerRef := &duckv1.KReference{
+		Name:       trigger.Name,
+		Namespace:  trigger.Namespace,
+		APIVersion: "eventing.knative.dev/v1",
+		Kind:       "Trigger",
+	}
+	triggerDest := &duckv1.Destination{Ref: triggerRef}
+
+	to, ok := g.vertices[makeComparableDestination(&trigger.Spec.Subscriber)]
+	if !ok {
+		to = &Vertex{
+			self: &trigger.Spec.Subscriber,
+		}
+		g.vertices[makeComparableDestination(&trigger.Spec.Subscriber)] = to
+	}
+
+	//TODO: the transform function should be set according to the trigger filter - there are multiple open issues to address this later
+	broker.AddEdge(to, triggerDest, NoTransform)
+
+	if trigger.Spec.Delivery == nil || trigger.Spec.Delivery.DeadLetterSink == nil {
+		return nil
+	}
+
+	dls, ok := g.vertices[makeComparableDestination(trigger.Spec.Delivery.DeadLetterSink)]
+	if !ok {
+		dls = &Vertex{
+			self: trigger.Spec.Delivery.DeadLetterSink,
+		}
+		g.vertices[makeComparableDestination(trigger.Spec.Delivery.DeadLetterSink)] = dls
+	}
+
+	broker.AddEdge(dls, triggerDest, NoTransform)
+
+	return nil
+
+}
diff --git a/pkg/graph/constructor_test.go b/pkg/graph/constructor_test.go
index a54aa79b07b..c8f15f19eda 100644
--- a/pkg/graph/constructor_test.go
+++ b/pkg/graph/constructor_test.go
@@ -31,6 +31,7 @@ import (
 
 var (
 	sampleUri, _ = apis.ParseURL("https://knative.dev")
+	secondUri, _ = apis.ParseURL("https://google.com")
 )
 
 func TestAddBroker(t *testing.T) {
@@ -129,6 +130,373 @@ func TestAddBroker(t *testing.T) {
 	}
 }
 
+func TestAddTrigger(t *testing.T) {
+	tests := []struct {
+		name     string
+		brokers  []eventingv1.Broker
+		triggers []eventingv1.Trigger
+		expected map[comparableDestination]*Vertex
+		wantErr  bool
+	}{
+		{
+			name: "One Trigger, One Broker, no DLS",
+			brokers: []eventingv1.Broker{{
+				ObjectMeta: metav1.ObjectMeta{
+					Name:      "my-broker",
+					Namespace: "default",
+				},
+			}},
+			triggers: []eventingv1.Trigger{{
+				ObjectMeta: metav1.ObjectMeta{
+					Name:      "my-trigger",
+					Namespace: "default",
+				},
+				Spec: eventingv1.TriggerSpec{
+					Broker: "my-broker",
+					Subscriber: duckv1.Destination{
+						URI: sampleUri,
+					},
+				},
+			}},
+			expected: map[comparableDestination]*Vertex{
+				{
+					Ref: duckv1.KReference{
+						Name:       "my-broker",
+						Namespace:  "default",
+						APIVersion: "eventing.knative.dev/v1",
+						Kind:       "Broker",
+					},
+				}: {
+					self: &duckv1.Destination{
+						Ref: &duckv1.KReference{
+							Name:       "my-broker",
+							Namespace:  "default",
+							APIVersion: "eventing.knative.dev/v1",
+							Kind:       "Broker",
+						},
+					},
+					outEdges: []*Edge{
+						{
+							self: &duckv1.Destination{
+								Ref: &duckv1.KReference{
+									Name:       "my-trigger",
+									Namespace:  "default",
+									APIVersion: "eventing.knative.dev/v1",
+									Kind:       "Trigger",
+								},
+							},
+							to: &Vertex{
+								self: &duckv1.Destination{
+									URI: sampleUri,
+								},
+							},
+							from: &Vertex{
+								self: &duckv1.Destination{
+									Ref: &duckv1.KReference{
+										Name:       "my-broker",
+										Namespace:  "default",
+										APIVersion: "eventing.knative.dev/v1",
+										Kind:       "Broker",
+									},
+								},
+							},
+						},
+					},
+				},
+				{
+					URI: *sampleUri,
+				}: {
+					self: &duckv1.Destination{
+						URI: sampleUri,
+					},
+					inEdges: []*Edge{
+						{
+							self: &duckv1.Destination{
+								Ref: &duckv1.KReference{
+									Name:       "my-trigger",
+									Namespace:  "default",
+									APIVersion: "eventing.knative.dev/v1",
+									Kind:       "Trigger",
+								},
+							},
+							to: &Vertex{
+								self: &duckv1.Destination{
+									URI: sampleUri,
+								},
+							},
+							from: &Vertex{
+								self: &duckv1.Destination{
+									Ref: &duckv1.KReference{
+										Name:       "my-broker",
+										Namespace:  "default",
+										APIVersion: "eventing.knative.dev/v1",
+										Kind:       "Broker",
+									},
+								},
+							},
+						},
+					},
+				},
+			},
+		},
+		{
+			name: "One Trigger, One Broker, both with DLS",
+			brokers: []eventingv1.Broker{{
+				ObjectMeta: metav1.ObjectMeta{
+					Name:      "my-broker",
+					Namespace: "default",
+				},
+				Spec: eventingv1.BrokerSpec{
+					Delivery: &eventingduckv1.DeliverySpec{
+						DeadLetterSink: &duckv1.Destination{
+							URI: secondUri,
+						},
+					},
+				},
+			}},
+			triggers: []eventingv1.Trigger{{
+				ObjectMeta: metav1.ObjectMeta{
+					Name:      "my-trigger",
+					Namespace: "default",
+				},
+				Spec: eventingv1.TriggerSpec{
+					Broker: "my-broker",
+					Subscriber: duckv1.Destination{
+						URI: sampleUri,
+					},
+					Delivery: &eventingduckv1.DeliverySpec{
+						DeadLetterSink: &duckv1.Destination{
+							URI: secondUri,
+						},
+					},
+				},
+			}},
+			expected: map[comparableDestination]*Vertex{
+				{
+					Ref: duckv1.KReference{
+						Name:       "my-broker",
+						Namespace:  "default",
+						APIVersion: "eventing.knative.dev/v1",
+						Kind:       "Broker",
+					},
+				}: {
+					self: &duckv1.Destination{
+						Ref: &duckv1.KReference{
+							Name:       "my-broker",
+							Namespace:  "default",
+							APIVersion: "eventing.knative.dev/v1",
+							Kind:       "Broker",
+						},
+					},
+					outEdges: []*Edge{
+						{
+							self: &duckv1.Destination{
+								Ref: &duckv1.KReference{
+									Name:       "my-trigger",
+									Namespace:  "default",
+									APIVersion: "eventing.knative.dev/v1",
+									Kind:       "Trigger",
+								},
+							},
+							to: &Vertex{
+								self: &duckv1.Destination{
+									URI: sampleUri,
+								},
+							},
+							from: &Vertex{
+								self: &duckv1.Destination{
+									Ref: &duckv1.KReference{
+										Name:       "my-broker",
+										Namespace:  "default",
+										APIVersion: "eventing.knative.dev/v1",
+										Kind:       "Broker",
+									},
+								},
+							},
+						},
+						{
+							self: &duckv1.Destination{
+								Ref: &duckv1.KReference{
+									Name:       "my-trigger",
+									Namespace:  "default",
+									APIVersion: "eventing.knative.dev/v1",
+									Kind:       "Trigger",
+								},
+							},
+							to: &Vertex{
+								self: &duckv1.Destination{
+									URI: secondUri,
+								},
+							},
+							from: &Vertex{
+								self: &duckv1.Destination{
+									Ref: &duckv1.KReference{
+										Name:       "my-broker",
+										Namespace:  "default",
+										APIVersion: "eventing.knative.dev/v1",
+										Kind:       "Broker",
+									},
+								},
+							},
+						},
+						{
+							self: &duckv1.Destination{
+								Ref: &duckv1.KReference{
+									Name:       "my-broker",
+									Namespace:  "default",
+									APIVersion: "eventing.knative.dev/v1",
+									Kind:       "Broker",
+								},
+							},
+							to: &Vertex{
+								self: &duckv1.Destination{
+									URI: secondUri,
+								},
+							},
+							from: &Vertex{
+								self: &duckv1.Destination{
+									Ref: &duckv1.KReference{
+										Name:       "my-broker",
+										Namespace:  "default",
+										APIVersion: "eventing.knative.dev/v1",
+										Kind:       "Broker",
+									},
+								},
+							},
+						},
+					},
+				},
+				{
+					URI: *sampleUri,
+				}: {
+					self: &duckv1.Destination{
+						URI: sampleUri,
+					},
+					inEdges: []*Edge{
+						{
+							self: &duckv1.Destination{
+								Ref: &duckv1.KReference{
+									Name:       "my-trigger",
+									Namespace:  "default",
+									APIVersion: "eventing.knative.dev/v1",
+									Kind:       "Trigger",
+								},
+							},
+							to: &Vertex{
+								self: &duckv1.Destination{
+									URI: sampleUri,
+								},
+							},
+							from: &Vertex{
+								self: &duckv1.Destination{
+									Ref: &duckv1.KReference{
+										Name:       "my-broker",
+										Namespace:  "default",
+										APIVersion: "eventing.knative.dev/v1",
+										Kind:       "Broker",
+									},
+								},
+							},
+						},
+					},
+				},
+				{
+					URI: *secondUri,
+				}: {
+					self: &duckv1.Destination{
+						URI: secondUri,
+					},
+					inEdges: []*Edge{
+						{
+							self: &duckv1.Destination{
+								Ref: &duckv1.KReference{
+									Name:       "my-trigger",
+									Namespace:  "default",
+									APIVersion: "eventing.knative.dev/v1",
+									Kind:       "Trigger",
+								},
+							},
+							to: &Vertex{
+								self: &duckv1.Destination{
+									URI: secondUri,
+								},
+							},
+							from: &Vertex{
+								self: &duckv1.Destination{
+									Ref: &duckv1.KReference{
+										Name:       "my-broker",
+										Namespace:  "default",
+										APIVersion: "eventing.knative.dev/v1",
+										Kind:       "Broker",
+									},
+								},
+							},
+						},
+						{
+							self: &duckv1.Destination{
+								Ref: &duckv1.KReference{
+									Name:       "my-broker",
+									Namespace:  "default",
+									APIVersion: "eventing.knative.dev/v1",
+									Kind:       "Broker",
+								},
+							},
+							to: &Vertex{
+								self: &duckv1.Destination{
+									URI: secondUri,
+								},
+							},
+							from: &Vertex{
+								self: &duckv1.Destination{
+									Ref: &duckv1.KReference{
+										Name:       "my-broker",
+										Namespace:  "default",
+										APIVersion: "eventing.knative.dev/v1",
+										Kind:       "Broker",
+									},
+								},
+							},
+						},
+					},
+				},
+			},
+		},
+		{
+			name:    "no broker",
+			brokers: []eventingv1.Broker{},
+			triggers: []eventingv1.Trigger{
+				{
+					ObjectMeta: metav1.ObjectMeta{
+						Name:      "my-trigger",
+						Namespace: "default",
+					},
+					Spec: eventingv1.TriggerSpec{
+						Broker: "my-broker",
+					},
+				},
+			},
+			wantErr: true,
+		},
+	}
+
+	for _, test := range tests {
+		t.Run(test.name, func(t *testing.T) {
+			g := NewGraph()
+			for _, broker := range test.brokers {
+				g.AddBroker(broker)
+			}
+			for _, trigger := range test.triggers {
+				err := g.AddTrigger(trigger)
+				if err != nil {
+					assert.True(t, test.wantErr)
+					return
+				}
+			}
+			checkTestResult(t, g.vertices, test.expected)
+		})
+	}
+}
+
 func TestAddChannel(t *testing.T) {
 	channelWithEdge := &Vertex{
 		self: &duckv1.Destination{