diff --git a/CHANGELOG.md b/CHANGELOG.md
index 354d8fb..c338694 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,12 @@
 # Changelog
 
+## 0.15.0
+### Added
+- `AnyVec` implements `Extend` now.
+- `AnyVecTyped` implements `Extend` now.
+- `AnyVec::append()` added.
+- `AnyVecTyped::append()` added.
+
 ## 0.14.0
 ### Added
 - Now library `no_std` friendly.
diff --git a/src/any_value/wrapper.rs b/src/any_value/wrapper.rs
index d76694d..9dcc3d5 100644
--- a/src/any_value/wrapper.rs
+++ b/src/any_value/wrapper.rs
@@ -8,6 +8,7 @@ use crate::any_value::{AnyValue, AnyValueMut, AnyValueTypelessMut, AnyValueTypel
 /// special in any way.
 /// 
 /// [AnyValueRaw]: super::AnyValueRaw
+#[derive(Debug)]
 pub struct AnyValueWrapper<T: 'static>{
     value: T
 }
@@ -17,7 +18,6 @@ impl<T: 'static> AnyValueWrapper<T> {
         Self{ value }
     }
 }
-
 impl<T: 'static> AnyValueSizeless for AnyValueWrapper<T> {
     type Type = T;
 
diff --git a/src/any_vec.rs b/src/any_vec.rs
index 9aaecfc..b7c414c 100644
--- a/src/any_vec.rs
+++ b/src/any_vec.rs
@@ -831,6 +831,25 @@ impl<Traits: ?Sized + Cloneable + Trait, M: MemBuilder> Clone for AnyVec<Traits,
     }
 }
 
+impl<Traits, M, A> Extend<A> for AnyVec<Traits, M>
+where
+    Traits: ?Sized + Trait, 
+    M: MemBuilder,
+    A: AnyValue,
+{
+    /// # Panics
+    ///
+    /// * Panics if type mismatch.
+    /// * Panics if out of memory.
+    fn extend<T: IntoIterator<Item=A>>(&mut self, iter: T) {
+        let iter = iter.into_iter();
+        self.raw.reserve(iter.size_hint().0);
+        for v in iter {
+            self.push(v);
+        }
+    }
+}
+
 impl<Traits: ?Sized + Trait, M: MemBuilder> Debug for AnyVec<Traits, M>{
     fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
         f.debug_struct("AnyVec")
@@ -930,4 +949,10 @@ impl<'a, T: 'static + Debug, M: MemBuilder + 'a> Debug for AnyVecMut<'a, T, M>{
     fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
         self.0.fmt(f)
     }
+}
+impl<'a, T: 'static, M: MemBuilder + 'a> Extend<T> for AnyVecMut<'a, T, M>{
+    #[inline]
+    fn extend<I: IntoIterator<Item=T>>(&mut self, iter: I) {
+        self.0.extend(iter)
+    }
 }
\ No newline at end of file
diff --git a/src/any_vec_typed.rs b/src/any_vec_typed.rs
index 1d81957..d78dd84 100644
--- a/src/any_vec_typed.rs
+++ b/src/any_vec_typed.rs
@@ -302,6 +302,18 @@ impl<'a, T: 'static + Debug, M: MemBuilder> Debug for AnyVecTyped<'a, T, M>{
     }
 }
 
+impl<'a, T: 'static, M: MemBuilder> Extend<T> for AnyVecTyped<'a, T, M>{
+    fn extend<I: IntoIterator<Item=T>>(&mut self, iter: I) {
+        let iter = iter.into_iter();
+        self.this_mut().reserve(iter.size_hint().0);
+        // We can't prove that iterator will return actual len in size_hint(),
+        // so we have to push items as usual. 
+        for v in iter {
+            self.push(v);
+        }        
+    }
+}
+
 // Do not implement Index, since we can't do the same for AnyVec
 /*
 impl<'a, T: 'static, I: SliceIndex<[T]>> Index<I> for AnyVecTyped<'a, T> {
diff --git a/tests/any_vec.rs b/tests/any_vec.rs
index 411d754..a98d98a 100644
--- a/tests/any_vec.rs
+++ b/tests/any_vec.rs
@@ -342,6 +342,25 @@ fn reserve_exact_test(){
     assert_eq!(any_vec.capacity(), 6);
 }
 
+#[test]
+fn extend_test(){
+    let mut any_vec: AnyVec = AnyVec::new::<String>();
+    any_vec.extend([
+        AnyValueWrapper::new(String::from("0")),
+        AnyValueWrapper::new(String::from("1")),
+        AnyValueWrapper::new(String::from("2")),
+    ]);
+    
+    assert_equal(
+        any_vec.iter().map(|v|v.downcast_ref::<String>().unwrap()), 
+        &[
+            String::from("0"),
+            String::from("1"),
+            String::from("2"),
+        ]
+    );
+}
+
 #[test]
 fn shrink_to_fit_test(){
     let mut any_vec: AnyVec = AnyVec::new::<String>();
diff --git a/tests/any_vec_typed.rs b/tests/any_vec_typed.rs
index 3bd5758..3298a64 100644
--- a/tests/any_vec_typed.rs
+++ b/tests/any_vec_typed.rs
@@ -225,6 +225,27 @@ fn append_test() {
     assert!(any_vec2.is_empty());
 }
 
+#[test]
+fn extend_test(){
+    let mut any_vec: AnyVec = AnyVec::new::<String>();
+    let mut vec = any_vec.downcast_mut::<String>().unwrap();
+    vec.extend([
+        String::from("0"),
+        String::from("1"),
+        String::from("2"),
+    ]);
+    
+    assert_equal(
+        vec, 
+        &[
+            String::from("0"),
+            String::from("1"),
+            String::from("2"),
+        ]
+    );
+}
+
+
 /*
 #[test]
 fn any_vec_index_test() {