diff --git a/cmd/helm/load_plugins.go b/cmd/helm/load_plugins.go
index f2fb5c01d..b8f34c19f 100644
--- a/cmd/helm/load_plugins.go
+++ b/cmd/helm/load_plugins.go
@@ -18,6 +18,8 @@ package main
 import (
 	"fmt"
 	"io"
+	"io/ioutil"
+	"log"
 	"os"
 	"os/exec"
 	"path/filepath"
@@ -26,10 +28,13 @@ import (
 
 	"github.com/pkg/errors"
 	"github.com/spf13/cobra"
+	"sigs.k8s.io/yaml"
 
 	"helm.sh/helm/v3/pkg/plugin"
 )
 
+const pluginStaticCompletionFile = "completion.yaml"
+
 type pluginError struct {
 	error
 	code int
@@ -61,6 +66,13 @@ func loadPlugins(baseCmd *cobra.Command, out io.Writer) {
 		return u, nil
 	}
 
+	// If we are dealing with the completion command, we try to load more details about the plugins
+	// if available, so as to allow for command and flag completion
+	if subCmd, _, err := baseCmd.Find(os.Args[1:]); err == nil && subCmd.Name() == "completion" {
+		loadPluginsForCompletion(baseCmd, found)
+		return
+	}
+
 	// Now we create commands for all of these.
 	for _, plug := range found {
 		plug := plug
@@ -180,3 +192,119 @@ func findPlugins(plugdirs string) ([]*plugin.Plugin, error) {
 	}
 	return found, nil
 }
+
+// pluginCommand represents the optional completion.yaml file of a plugin
+type pluginCommand struct {
+	Name      string          `json:"name"`
+	ValidArgs []string        `json:"validArgs"`
+	Flags     []string        `json:"flags"`
+	Commands  []pluginCommand `json:"commands"`
+}
+
+// loadPluginsForCompletion will load and parse any completion.yaml provided by the plugins
+func loadPluginsForCompletion(baseCmd *cobra.Command, plugins []*plugin.Plugin) {
+	for _, plug := range plugins {
+		// Parse the yaml file providing the plugin's subcmds and flags
+		cmds, err := loadFile(strings.Join(
+			[]string{plug.Dir, pluginStaticCompletionFile}, string(filepath.Separator)))
+
+		if err != nil {
+			// The file could be missing or invalid.  Either way, we at least create the command
+			// for the plugin name.
+			if settings.Debug {
+				log.Output(2, fmt.Sprintf("[info] %s\n", err.Error()))
+			}
+			cmds = &pluginCommand{Name: plug.Metadata.Name}
+		}
+
+		// We know what the plugin name must be.
+		// Let's set it in case the Name field was not specified correctly in the file.
+		// This insures that we will at least get the plugin name to complete, even if
+		// there is a problem with the completion.yaml file
+		cmds.Name = plug.Metadata.Name
+
+		addPluginCommands(baseCmd, cmds)
+	}
+}
+
+// addPluginCommands is a recursive method that adds the different levels
+// of sub-commands and flags for the plugins that provide such information
+func addPluginCommands(baseCmd *cobra.Command, cmds *pluginCommand) {
+	if cmds == nil {
+		return
+	}
+
+	if len(cmds.Name) == 0 {
+		// Missing name for a command
+		if settings.Debug {
+			log.Output(2, fmt.Sprintf("[info] sub-command name field missing for %s", baseCmd.CommandPath()))
+		}
+		return
+	}
+
+	// Create a fake command just so the completion script will include it
+	c := &cobra.Command{
+		Use:       cmds.Name,
+		ValidArgs: cmds.ValidArgs,
+		// A Run is required for it to be a valid command without subcommands
+		Run: func(cmd *cobra.Command, args []string) {},
+	}
+	baseCmd.AddCommand(c)
+
+	// Create fake flags.
+	if len(cmds.Flags) > 0 {
+		// The flags can be created with any type, since we only need them for completion.
+		// pflag does not allow to create short flags without a corresponding long form
+		// so we look for all short flags and match them to any long flag.  This will allow
+		// plugins to provide short flags without a long form.
+		// If there are more short-flags than long ones, we'll create an extra long flag with
+		// the same single letter as the short form.
+		shorts := []string{}
+		longs := []string{}
+		for _, flag := range cmds.Flags {
+			if len(flag) == 1 {
+				shorts = append(shorts, flag)
+			} else {
+				longs = append(longs, flag)
+			}
+		}
+
+		f := c.Flags()
+		if len(longs) >= len(shorts) {
+			for i := range longs {
+				if i < len(shorts) {
+					f.BoolP(longs[i], shorts[i], false, "")
+				} else {
+					f.Bool(longs[i], false, "")
+				}
+			}
+		} else {
+			for i := range shorts {
+				if i < len(longs) {
+					f.BoolP(longs[i], shorts[i], false, "")
+				} else {
+					// Create a long flag with the same name as the short flag.
+					// Not a perfect solution, but its better than ignoring the extra short flags.
+					f.BoolP(shorts[i], shorts[i], false, "")
+				}
+			}
+		}
+	}
+
+	// Recursively add any sub-commands
+	for _, cmd := range cmds.Commands {
+		addPluginCommands(c, &cmd)
+	}
+}
+
+// loadFile takes a yaml file at the given path, parses it and returns a pluginCommand object
+func loadFile(path string) (*pluginCommand, error) {
+	cmds := new(pluginCommand)
+	b, err := ioutil.ReadFile(path)
+	if err != nil {
+		return cmds, errors.New(fmt.Sprintf("File (%s) not provided by plugin. No plugin auto-completion possible.", path))
+	}
+
+	err = yaml.Unmarshal(b, cmds)
+	return cmds, err
+}
diff --git a/cmd/helm/plugin_test.go b/cmd/helm/plugin_test.go
index 3fd3a4197..2d9a24ba9 100644
--- a/cmd/helm/plugin_test.go
+++ b/cmd/helm/plugin_test.go
@@ -19,10 +19,12 @@ import (
 	"bytes"
 	"os"
 	"runtime"
+	"sort"
 	"strings"
 	"testing"
 
 	"github.com/spf13/cobra"
+	"github.com/spf13/pflag"
 )
 
 func TestManuallyProcessArgs(t *testing.T) {
@@ -151,6 +153,95 @@ func TestLoadPlugins(t *testing.T) {
 	}
 }
 
+type staticCompletionDetails struct {
+	use       string
+	validArgs []string
+	flags     []string
+	next      []staticCompletionDetails
+}
+
+func TestLoadPluginsForCompletion(t *testing.T) {
+	settings.PluginsDirectory = "testdata/helmhome/helm/plugins"
+
+	var out bytes.Buffer
+
+	cmd := &cobra.Command{
+		Use: "completion",
+	}
+
+	loadPlugins(cmd, &out)
+
+	tests := []staticCompletionDetails{
+		{"args", []string{}, []string{}, []staticCompletionDetails{}},
+		{"echo", []string{}, []string{}, []staticCompletionDetails{}},
+		{"env", []string{}, []string{"global"}, []staticCompletionDetails{
+			{"list", []string{}, []string{"a", "all", "log"}, []staticCompletionDetails{}},
+			{"remove", []string{"all", "one"}, []string{}, []staticCompletionDetails{}},
+		}},
+		{"exitwith", []string{}, []string{}, []staticCompletionDetails{
+			{"code", []string{}, []string{"a", "b"}, []staticCompletionDetails{}},
+		}},
+		{"fullenv", []string{}, []string{"q", "z"}, []staticCompletionDetails{
+			{"empty", []string{}, []string{}, []staticCompletionDetails{}},
+			{"full", []string{}, []string{}, []staticCompletionDetails{
+				{"less", []string{}, []string{"a", "all"}, []staticCompletionDetails{}},
+				{"more", []string{"one", "two"}, []string{"b", "ball"}, []staticCompletionDetails{}},
+			}},
+		}},
+	}
+	checkCommand(t, cmd.Commands(), tests)
+}
+
+func checkCommand(t *testing.T, plugins []*cobra.Command, tests []staticCompletionDetails) {
+	if len(plugins) != len(tests) {
+		t.Fatalf("Expected commands %v, got %v", tests, plugins)
+	}
+
+	for i := 0; i < len(plugins); i++ {
+		pp := plugins[i]
+		tt := tests[i]
+		if pp.Use != tt.use {
+			t.Errorf("%s: Expected Use=%q, got %q", pp.Name(), tt.use, pp.Use)
+		}
+
+		targs := tt.validArgs
+		pargs := pp.ValidArgs
+		if len(targs) != len(pargs) {
+			t.Fatalf("%s: expected args %v, got %v", pp.Name(), targs, pargs)
+		}
+
+		sort.Strings(targs)
+		sort.Strings(pargs)
+		for j := range targs {
+			if targs[j] != pargs[j] {
+				t.Errorf("%s: expected validArg=%q, got %q", pp.Name(), targs[j], pargs[j])
+			}
+		}
+
+		tflags := tt.flags
+		var pflags []string
+		pp.LocalFlags().VisitAll(func(flag *pflag.Flag) {
+			pflags = append(pflags, flag.Name)
+			if len(flag.Shorthand) > 0 && flag.Shorthand != flag.Name {
+				pflags = append(pflags, flag.Shorthand)
+			}
+		})
+		if len(tflags) != len(pflags) {
+			t.Fatalf("%s: expected flags %v, got %v", pp.Name(), tflags, pflags)
+		}
+
+		sort.Strings(tflags)
+		sort.Strings(pflags)
+		for j := range tflags {
+			if tflags[j] != pflags[j] {
+				t.Errorf("%s: expected flag=%q, got %q", pp.Name(), tflags[j], pflags[j])
+			}
+		}
+		// Check the next level
+		checkCommand(t, pp.Commands(), tt.next)
+	}
+}
+
 func TestLoadPlugins_HelmNoPlugins(t *testing.T) {
 	settings.PluginsDirectory = "testdata/helmhome/helm/plugins"
 	settings.RepositoryConfig = "testdata/helmhome/helm/repository"
diff --git a/cmd/helm/testdata/helmhome/helm/plugins/echo/completion.yaml b/cmd/helm/testdata/helmhome/helm/plugins/echo/completion.yaml
new file mode 100644
index 000000000..e69de29bb
diff --git a/cmd/helm/testdata/helmhome/helm/plugins/env/completion.yaml b/cmd/helm/testdata/helmhome/helm/plugins/env/completion.yaml
new file mode 100644
index 000000000..e479a0503
--- /dev/null
+++ b/cmd/helm/testdata/helmhome/helm/plugins/env/completion.yaml
@@ -0,0 +1,13 @@
+name: env
+commands:
+  - name: list
+    flags:
+    - a
+    - all
+    - log
+  - name: remove
+    validArgs:
+    - all
+    - one
+flags:
+- global
diff --git a/cmd/helm/testdata/helmhome/helm/plugins/exitwith/completion.yaml b/cmd/helm/testdata/helmhome/helm/plugins/exitwith/completion.yaml
new file mode 100644
index 000000000..e5bf440f6
--- /dev/null
+++ b/cmd/helm/testdata/helmhome/helm/plugins/exitwith/completion.yaml
@@ -0,0 +1,5 @@
+commands:
+  - name: code
+    flags:
+    - a
+    - b
diff --git a/cmd/helm/testdata/helmhome/helm/plugins/fullenv/completion.yaml b/cmd/helm/testdata/helmhome/helm/plugins/fullenv/completion.yaml
new file mode 100644
index 000000000..e0b161c69
--- /dev/null
+++ b/cmd/helm/testdata/helmhome/helm/plugins/fullenv/completion.yaml
@@ -0,0 +1,19 @@
+name: wrongname
+commands:
+  - name: empty
+  - name: full
+    commands:
+    - name: more
+      validArgs:
+      - one
+      - two
+      flags:
+      - b
+      - ball
+    - name: less
+      flags:
+      - a
+      - all
+flags:
+- z
+- q