diff --git a/lib/hanami/action.rb b/lib/hanami/action.rb
index 4e1015cb..c2e12c7b 100644
--- a/lib/hanami/action.rb
+++ b/lib/hanami/action.rb
@@ -301,6 +301,7 @@ def initialize(config: self.class.config)
     # @since 0.1.0
     # @api private
     def call(env)
+      env[ACTION_INSTANCE] = self
       request  = nil
       response = nil
 
diff --git a/lib/hanami/action/constants.rb b/lib/hanami/action/constants.rb
index 845cce64..11bc8fa1 100644
--- a/lib/hanami/action/constants.rb
+++ b/lib/hanami/action/constants.rb
@@ -245,5 +245,9 @@ class Action
     # @since 2.0.0
     # @api private
     DEFAULT_CHARSET = "utf-8"
+
+    # @since 2.2.0
+    # @api private
+    ACTION_INSTANCE = "hanami.action_instance"
   end
 end
diff --git a/spec/support/fixtures.rb b/spec/support/fixtures.rb
index ac803e03..ae72455c 100644
--- a/spec/support/fixtures.rb
+++ b/spec/support/fixtures.rb
@@ -585,7 +585,9 @@ def handle(_req, _res)
 
 class ParamsAction < Hanami::Action
   def handle(req, res)
-    res.body = req.params.to_h.inspect
+    params = req.params.to_h
+    params.delete(Hanami::Action::ACTION_INSTANCE.to_sym)
+    res.body = params.inspect
   end
 end
 
diff --git a/spec/unit/hanami/action_spec.rb b/spec/unit/hanami/action_spec.rb
index d891ef64..a75aae47 100644
--- a/spec/unit/hanami/action_spec.rb
+++ b/spec/unit/hanami/action_spec.rb
@@ -21,6 +21,14 @@
       expect(response.body).to    eq(["Hi from TestAction!"])
     end
 
+    it "sets the action instance on the request environment object" do
+      action = CallAction.new
+      env = {}
+      action.call(env)
+
+      expect(env[Hanami::Action::ACTION_INSTANCE]).to eq(action)
+    end
+
     context "when an exception isn't handled" do
       it "should raise an actual exception" do
         expect { UncheckedErrorCallAction.new.call({}) }.to raise_error(RuntimeError)