diff --git a/README.md b/README.md
index 5c5282b..410c5e6 100644
--- a/README.md
+++ b/README.md
@@ -30,7 +30,8 @@ let mySmartstream = new Smartstream([
     gulp.dest('./some/output/path')
 ])
 
-mySmartstream.onError((err) => {/* handle error */}) // handles all errors in stream
+mySmartstream.onError((err) => { /* handle error */ }) // handles all errors in stream
+myStream.onCustomEvent('myeventname', (args...) => { /* Do something */ }) // emit an custom event anywhere in your stream
 mySmartstream.run().then(() => {/* do something when stream is finished */})
 ```
 
diff --git a/dist/index.d.ts b/dist/index.d.ts
index 8bcbe3d..a19c96b 100644
--- a/dist/index.d.ts
+++ b/dist/index.d.ts
@@ -3,9 +3,6 @@ import * as plugins from './smartstream.plugins';
 export interface IErrorFunction {
     (err: any): any;
 }
-export interface IStreamStartFunction {
-    (stream: any): any;
-}
 export interface ICustomEventFunction {
     (): any;
 }
@@ -17,10 +14,13 @@ export interface ICustomEventObject {
  * class Smartstream handles
  */
 export declare class Smartstream {
-    streamArray: any[];
-    errorFunction: IErrorFunction;
-    streamStartFunction: IStreamStartFunction;
-    customEventObjectArray: ICustomEventObject[];
+    private streamArray;
+    private errorFunction;
+    private customEventObjectArray;
+    private streamStartedDeferred;
+    /**
+     * constructor
+     */
     constructor(streamArrayArg: any[]);
     /**
      * attach an error handler to the stream to prevent throwing
@@ -29,7 +29,11 @@ export declare class Smartstream {
     /**
      * make something with the stream itself
      */
-    onStreamStart(): plugins.q.Promise<any>;
+    streamStarted(): plugins.q.Promise<any>;
+    /**
+     * attach listener to custom event
+     */
+    onCustomEvent(eventNameArg: string, eventFunctionArg: ICustomEventFunction): void;
     /**
      * run the stream
      * @returns Promise
diff --git a/dist/index.js b/dist/index.js
index c360231..80dec5e 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -4,11 +4,14 @@ const plugins = require("./smartstream.plugins");
  * class Smartstream handles
  */
 class Smartstream {
+    /**
+     * constructor
+     */
     constructor(streamArrayArg) {
         this.streamArray = [];
         this.errorFunction = null;
-        this.streamStartFunction = null;
         this.customEventObjectArray = [];
+        this.streamStartedDeferred = plugins.q.defer();
         this.streamArray = streamArrayArg;
     }
     /**
@@ -20,7 +23,17 @@ class Smartstream {
     /**
      * make something with the stream itself
      */
-    onStreamStart() {
+    streamStarted() {
+        return this.streamStartedDeferred.promise;
+    }
+    /**
+     * attach listener to custom event
+     */
+    onCustomEvent(eventNameArg, eventFunctionArg) {
+        this.customEventObjectArray.push({
+            eventName: eventNameArg,
+            eventFunction: eventFunctionArg
+        });
     }
     /**
      * run the stream
@@ -51,6 +64,7 @@ class Smartstream {
             }
             firstIteration = false;
         }
+        this.streamStartedDeferred.resolve();
         finalStream.on('end', function () {
             done.resolve();
         });
@@ -64,4 +78,4 @@ class Smartstream {
     }
 }
 exports.Smartstream = Smartstream;
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\ No newline at end of file
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\ No newline at end of file
diff --git a/ts/index.ts b/ts/index.ts
index f278038..627d144 100644
--- a/ts/index.ts
+++ b/ts/index.ts
@@ -4,10 +4,6 @@ export interface IErrorFunction {
     (err): any
 }
 
-export interface IStreamStartFunction {
-    (stream): any
-}
-
 export interface ICustomEventFunction {
     (): any
 }
@@ -21,10 +17,14 @@ export interface ICustomEventObject {
  * class Smartstream handles 
  */
 export class Smartstream {
-    streamArray = []
-    errorFunction: IErrorFunction = null
-    streamStartFunction: IStreamStartFunction = null
-    customEventObjectArray: ICustomEventObject[] = []
+    private streamArray = []
+    private errorFunction: IErrorFunction = null
+    private customEventObjectArray: ICustomEventObject[] = []
+    private streamStartedDeferred = plugins.q.defer()
+
+    /**
+     * constructor
+     */
     constructor(streamArrayArg: any[]) {
         this.streamArray = streamArrayArg
     }
@@ -39,8 +39,18 @@ export class Smartstream {
     /**
      * make something with the stream itself
      */
-    onStreamStart(): plugins.q.Promise<any> {
+    streamStarted(): plugins.q.Promise<any> {
+        return this.streamStartedDeferred.promise
+    }
 
+    /**
+     * attach listener to custom event
+     */
+    onCustomEvent(eventNameArg: string, eventFunctionArg: ICustomEventFunction) {
+        this.customEventObjectArray.push({
+            eventName: eventNameArg,
+            eventFunction: eventFunctionArg
+        })
     }
 
     /**
@@ -72,6 +82,9 @@ export class Smartstream {
             }
             firstIteration = false
         }
+    
+        this.streamStartedDeferred.resolve()
+
         finalStream.on('end',function(){
             done.resolve()
         })