diff --git a/akka-actor/src/main/scala/akka/util/ByteString.scala b/akka-actor/src/main/scala/akka/util/ByteString.scala
index dfcfb549af..837fec437e 100644
--- a/akka-actor/src/main/scala/akka/util/ByteString.scala
+++ b/akka-actor/src/main/scala/akka/util/ByteString.scala
@@ -60,6 +60,16 @@ object ByteString {
    */
   def fromArray(array: Array[Byte]): ByteString = apply(array)
 
+  /**
+   * Creates a ByteString without allocation.
+   *
+   * Use with caution:
+   * Since the ByteString is created without copying the byte array,
+   * this makes it unsafe if an array is passed in and mutated afterwards.
+   * DO NOT USE if you are not sure whether the passed-in array will be changed outside this method.
+   */
+  def fromArrayUnsafe(array: Array[Byte]): ByteString = ByteString1C(array)
+
   /**
    * Creates a new ByteString by copying length bytes starting at offset from
    * an Array.
@@ -67,6 +77,16 @@ object ByteString {
   def fromArray(array: Array[Byte], offset: Int, length: Int): ByteString =
     CompactByteString.fromArray(array, offset, length)
 
+  /**
+   * Creates a ByteString without allocation, using length bytes starting at offset from an Array.
+   *
+   * Use with caution:
+   * Since the ByteString is created without copying the byte array,
+   * this makes it unsafe if an array is passed in and mutated afterwards.
+   * DO NOT USE if you are not sure whether the passed-in array will be changed outside this method.
+   */
+  def fromArrayUnsafe(array: Array[Byte], offset: Int, length: Int): ByteString = ByteString1(array, offset, length)
+
   /**
    * JAVA API
    * Creates a new ByteString by copying an int array by converting from integral numbers to bytes.