diff --git a/.gitignore b/.gitignore
index aea73858e5..c903cf6b46 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,4 +5,6 @@ coverage.out
 .idea/
 vendor/
 .DS_Store
-.vscode
\ No newline at end of file
+.vscode
+# vim temp files
+*.swp
diff --git a/github/apps_hooks_deliveries.go b/github/apps_hooks_deliveries.go
new file mode 100644
index 0000000000..0b631b80e8
--- /dev/null
+++ b/github/apps_hooks_deliveries.go
@@ -0,0 +1,72 @@
+// Copyright 2021 The go-github AUTHORS. All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package github
+
+import (
+	"context"
+	"fmt"
+)
+
+// ListHookDeliveries lists deliveries of an App webhook.
+//
+// GitHub API docs: https://docs.github.com/en/rest/reference/apps#list-deliveries-for-an-app-webhook
+func (s *AppsService) ListHookDeliveries(ctx context.Context, opts *ListCursorOptions) ([]*HookDelivery, *Response, error) {
+	u, err := addOptions("app/hook/deliveries", opts)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	req, err := s.client.NewRequest("GET", u, nil)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	deliveries := []*HookDelivery{}
+	resp, err := s.client.Do(ctx, req, &deliveries)
+	if err != nil {
+		return nil, resp, err
+	}
+
+	return deliveries, resp, nil
+}
+
+// GetHookDelivery returns the App webhook delivery with the specified ID.
+//
+// GitHub API docs: https://docs.github.com/en/rest/reference/apps#get-a-delivery-for-an-app-webhook
+func (s *AppsService) GetHookDelivery(ctx context.Context, deliveryID int64) (*HookDelivery, *Response, error) {
+	u := fmt.Sprintf("app/hook/deliveries/%v", deliveryID)
+	req, err := s.client.NewRequest("GET", u, nil)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	h := new(HookDelivery)
+	resp, err := s.client.Do(ctx, req, h)
+	if err != nil {
+		return nil, resp, err
+	}
+
+	return h, resp, nil
+}
+
+// RedeliverHookDelivery redelivers a delivery for an App webhook.
+//
+// GitHub API docs: https://docs.github.com/en/rest/reference/apps#redeliver-a-delivery-for-an-app-webhook
+func (s *AppsService) RedeliverHookDelivery(ctx context.Context, deliveryID int64) (*HookDelivery, *Response, error) {
+	u := fmt.Sprintf("app/hook/deliveries/%v/attempts", deliveryID)
+	req, err := s.client.NewRequest("POST", u, nil)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	h := new(HookDelivery)
+	resp, err := s.client.Do(ctx, req, h)
+	if err != nil {
+		return nil, resp, err
+	}
+
+	return h, resp, nil
+}
diff --git a/github/apps_hooks_deliveries_test.go b/github/apps_hooks_deliveries_test.go
new file mode 100644
index 0000000000..38e25540cf
--- /dev/null
+++ b/github/apps_hooks_deliveries_test.go
@@ -0,0 +1,119 @@
+// Copyright 2021 The go-github AUTHORS. All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package github
+
+import (
+	"context"
+	"fmt"
+	"net/http"
+	"testing"
+
+	"github.com/google/go-cmp/cmp"
+)
+
+func TestAppsService_ListHookDeliveries(t *testing.T) {
+	client, mux, _, teardown := setup()
+	defer teardown()
+
+	mux.HandleFunc("/app/hook/deliveries", func(w http.ResponseWriter, r *http.Request) {
+		testMethod(t, r, "GET")
+		testFormValues(t, r, values{"cursor": "v1_12077215967"})
+		fmt.Fprint(w, `[{"id":1}, {"id":2}]`)
+	})
+
+	opts := &ListCursorOptions{Cursor: "v1_12077215967"}
+
+	ctx := context.Background()
+
+	deliveries, _, err := client.Apps.ListHookDeliveries(ctx, opts)
+	if err != nil {
+		t.Errorf("Apps.ListHookDeliveries returned error: %v", err)
+	}
+
+	want := []*HookDelivery{{ID: Int64(1)}, {ID: Int64(2)}}
+	if d := cmp.Diff(deliveries, want); d != "" {
+		t.Errorf("Apps.ListHooks want (-), got (+):\n%s", d)
+	}
+
+	const methodName = "ListHookDeliveries"
+	testNewRequestAndDoFailure(t, methodName, client, func() (*Response, error) {
+		got, resp, err := client.Apps.ListHookDeliveries(ctx, opts)
+		if got != nil {
+			t.Errorf("testNewRequestAndDoFailure %v = %#v, want nil", methodName, got)
+		}
+		return resp, err
+	})
+}
+
+func TestAppsService_GetHookDelivery(t *testing.T) {
+	client, mux, _, teardown := setup()
+	defer teardown()
+
+	mux.HandleFunc("/app/hook/deliveries/1", func(w http.ResponseWriter, r *http.Request) {
+		testMethod(t, r, "GET")
+		fmt.Fprint(w, `{"id":1}`)
+	})
+
+	ctx := context.Background()
+	hook, _, err := client.Apps.GetHookDelivery(ctx, 1)
+	if err != nil {
+		t.Errorf("Apps.GetHookDelivery returned error: %v", err)
+	}
+
+	want := &HookDelivery{ID: Int64(1)}
+	if !cmp.Equal(hook, want) {
+		t.Errorf("Apps.GetHookDelivery returned %+v, want %+v", hook, want)
+	}
+
+	const methodName = "GetHookDelivery"
+	testBadOptions(t, methodName, func() (err error) {
+		_, _, err = client.Apps.GetHookDelivery(ctx, -1)
+		return err
+	})
+
+	testNewRequestAndDoFailure(t, methodName, client, func() (*Response, error) {
+		got, resp, err := client.Apps.GetHookDelivery(ctx, 1)
+		if got != nil {
+			t.Errorf("testNewRequestAndDoFailure %v = %#v, want nil", methodName, got)
+		}
+		return resp, err
+	})
+}
+
+func TestAppsService_RedeliverHookDelivery(t *testing.T) {
+	client, mux, _, teardown := setup()
+	defer teardown()
+
+	mux.HandleFunc("/app/hook/deliveries/1/attempts", func(w http.ResponseWriter, r *http.Request) {
+		testMethod(t, r, "POST")
+		fmt.Fprint(w, `{"id":1}`)
+	})
+
+	ctx := context.Background()
+	hook, _, err := client.Apps.RedeliverHookDelivery(ctx, 1)
+	if err != nil {
+		t.Errorf("Apps.RedeliverHookDelivery returned error: %v", err)
+	}
+
+	want := &HookDelivery{ID: Int64(1)}
+	if !cmp.Equal(hook, want) {
+		t.Errorf("Apps.RedeliverHookDelivery returned %+v, want %+v", hook, want)
+	}
+
+	const methodName = "RedeliverHookDelivery"
+	testBadOptions(t, methodName, func() (err error) {
+		_, _, err = client.Apps.RedeliverHookDelivery(ctx, -1)
+		return err
+	})
+
+	testNewRequestAndDoFailure(t, methodName, client, func() (*Response, error) {
+		got, resp, err := client.Apps.RedeliverHookDelivery(ctx, 1)
+		if got != nil {
+			t.Errorf("testNewRequestAndDoFailure %v = %#v, want nil", methodName, got)
+		}
+		return resp, err
+	})
+}