diff --git a/dlls/d3drm/frame.c b/dlls/d3drm/frame.c
index 6d2dc141ae8..0d6ee149fa1 100644
--- a/dlls/d3drm/frame.c
+++ b/dlls/d3drm/frame.c
@@ -3348,16 +3348,15 @@ static SIZE_T d3drm_animation_get_insert_position(const struct d3drm_animation_k
 static const struct d3drm_animation_key *d3drm_animation_get_range(const struct d3drm_animation_keys *keys,
         D3DVALUE time_min, D3DVALUE time_max, SIZE_T *count)
 {
-    SIZE_T min, max;
+    SIZE_T min;
 
     if (!keys->count || time_max < keys->keys[0].time
             || time_min > keys->keys[keys->count - 1].time)
         return NULL;
 
     min = d3drm_animation_get_index_min(keys->keys, keys->count, time_min);
-    max = d3drm_animation_get_index_max(&keys->keys[min], keys->count - min, time_max);
-
-    *count = max - min + 1;
+    if (count)
+        *count = d3drm_animation_get_index_max(&keys->keys[min], keys->count - min, time_max) - min + 1;
 
     return &keys->keys[min];
 }
@@ -3493,11 +3492,41 @@ static HRESULT WINAPI d3drm_animation1_AddScaleKey(IDirect3DRMAnimation *iface,
     return d3drm_animation2_AddScaleKey(&animation->IDirect3DRMAnimation2_iface, time, x, y, z);
 }
 
+static void d3drm_animation_delete_key(struct d3drm_animation_keys *keys, const struct d3drm_animation_key *key)
+{
+    SIZE_T index = key - keys->keys;
+
+    if (index < keys->count - 1)
+        memmove(&keys->keys[index], &keys->keys[index + 1], sizeof(*keys->keys) * (keys->count - index - 1));
+    --keys->count;
+}
+
+static HRESULT WINAPI d3drm_animation2_DeleteKey(IDirect3DRMAnimation2 *iface, D3DVALUE time)
+{
+    struct d3drm_animation *animation = impl_from_IDirect3DRMAnimation2(iface);
+    const struct d3drm_animation_key *key;
+
+    TRACE("iface %p, time %.8e.\n", iface, time);
+
+    if ((key = d3drm_animation_get_range(&animation->rotate, time, time, NULL)))
+        d3drm_animation_delete_key(&animation->rotate, key);
+
+    if ((key = d3drm_animation_get_range(&animation->position, time, time, NULL)))
+        d3drm_animation_delete_key(&animation->position, key);
+
+    if ((key = d3drm_animation_get_range(&animation->scale, time, time, NULL)))
+        d3drm_animation_delete_key(&animation->scale, key);
+
+    return D3DRM_OK;
+}
+
 static HRESULT WINAPI d3drm_animation1_DeleteKey(IDirect3DRMAnimation *iface, D3DVALUE time)
 {
-    FIXME("iface %p, time %.8e.\n", iface, time);
+    struct d3drm_animation *animation = impl_from_IDirect3DRMAnimation(iface);
 
-    return E_NOTIMPL;
+    TRACE("iface %p, time %.8e.\n", iface, time);
+
+    return d3drm_animation2_DeleteKey(&animation->IDirect3DRMAnimation2_iface, time);
 }
 
 static HRESULT WINAPI d3drm_animation1_SetFrame(IDirect3DRMAnimation *iface, IDirect3DRMFrame *frame)
@@ -3544,13 +3573,6 @@ static D3DRMANIMATIONOPTIONS WINAPI d3drm_animation1_GetOptions(IDirect3DRMAnima
     return d3drm_animation2_GetOptions(&animation->IDirect3DRMAnimation2_iface);
 }
 
-static HRESULT WINAPI d3drm_animation2_DeleteKey(IDirect3DRMAnimation2 *iface, D3DVALUE time)
-{
-    FIXME("iface %p, time %.8e.\n", iface, time);
-
-    return E_NOTIMPL;
-}
-
 static HRESULT WINAPI d3drm_animation2_SetFrame(IDirect3DRMAnimation2 *iface, IDirect3DRMFrame3 *frame)
 {
     struct d3drm_animation *animation = impl_from_IDirect3DRMAnimation2(iface);
diff --git a/dlls/d3drm/tests/d3drm.c b/dlls/d3drm/tests/d3drm.c
index f19558e2484..c59763d602b 100644
--- a/dlls/d3drm/tests/d3drm.c
+++ b/dlls/d3drm/tests/d3drm.c
@@ -7013,9 +7013,81 @@ static void test_animation(void)
     memset(&key, 0, sizeof(key));
     key.dwSize = sizeof(key);
     key.dwKeyType = D3DRMANIMATION_POSITIONKEY;
+    key.dvPositionKey.x = 8.0f;
     hr = IDirect3DRMAnimation2_AddKey(animation2, &key);
     ok(SUCCEEDED(hr), "Failed to add key, hr %#x.\n", hr);
 
+    /* Delete tests. */
+    hr = IDirect3DRMAnimation_AddRotateKey(animation, 0.0f, &q);
+    ok(SUCCEEDED(hr), "Failed to add rotation key, hr %#.x\n", hr);
+
+    hr = IDirect3DRMAnimation_AddScaleKey(animation, 0.0f, 1.0f, 2.0f, 1.0f);
+    ok(SUCCEEDED(hr), "Failed to add scale key, hr %#x.\n", hr);
+
+    count = 0;
+    memset(keys, 0, sizeof(keys));
+    hr = IDirect3DRMAnimation2_GetKeys(animation2, -1000.0f, 1000.0f, &count, keys);
+    ok(SUCCEEDED(hr), "Failed to get key count, hr %#x.\n", hr);
+    ok(count == 9, "Unexpected key count %u.\n", count);
+
+    ok(keys[0].dwKeyType == D3DRMANIMATION_ROTATEKEY, "Unexpected key type %u.\n", keys[0].dwKeyType);
+    ok(keys[1].dwKeyType == D3DRMANIMATION_ROTATEKEY, "Unexpected key type %u.\n", keys[1].dwKeyType);
+    ok(keys[2].dwKeyType == D3DRMANIMATION_POSITIONKEY, "Unexpected key type %u.\n", keys[2].dwKeyType);
+    ok(keys[3].dwKeyType == D3DRMANIMATION_POSITIONKEY, "Unexpected key type %u.\n", keys[3].dwKeyType);
+    ok(keys[4].dwKeyType == D3DRMANIMATION_POSITIONKEY, "Unexpected key type %u.\n", keys[4].dwKeyType);
+    ok(keys[5].dwKeyType == D3DRMANIMATION_POSITIONKEY, "Unexpected key type %u.\n", keys[5].dwKeyType);
+    ok(keys[6].dwKeyType == D3DRMANIMATION_POSITIONKEY, "Unexpected key type %u.\n", keys[6].dwKeyType);
+    ok(keys[7].dwKeyType == D3DRMANIMATION_SCALEKEY, "Unexpected key type %u.\n", keys[7].dwKeyType);
+    ok(keys[8].dwKeyType == D3DRMANIMATION_SCALEKEY, "Unexpected key type %u.\n", keys[8].dwKeyType);
+
+    ok(keys[0].dvTime == 0.0f, "Unexpected key time %.8e.\n", keys[0].dvTime);
+    ok(keys[1].dvTime == 0.0f, "Unexpected key time %.8e.\n", keys[1].dvTime);
+    ok(keys[2].dvTime == 0.0f, "Unexpected key time %.8e.\n", keys[2].dvTime);
+    ok(keys[3].dvTime == 0.0f, "Unexpected key time %.8e.\n", keys[3].dvTime);
+    ok(keys[4].dvTime == 0.0f, "Unexpected key time %.8e.\n", keys[4].dvTime);
+    ok(keys[5].dvTime == 80.0f, "Unexpected key time %.8e.\n", keys[5].dvTime);
+    ok(keys[6].dvTime == 99.0f, "Unexpected key time %.8e.\n", keys[6].dvTime);
+    ok(keys[7].dvTime == 0.0f, "Unexpected key time %.8e.\n", keys[7].dvTime);
+    ok(keys[8].dvTime == 0.0f, "Unexpected key time %.8e.\n", keys[8].dvTime);
+
+    hr = IDirect3DRMAnimation_DeleteKey(animation, -100.0f);
+    ok(SUCCEEDED(hr), "Failed to delete keys, hr %#x.\n", hr);
+
+    hr = IDirect3DRMAnimation_DeleteKey(animation, 100.0f);
+    ok(SUCCEEDED(hr), "Failed to delete keys, hr %#x.\n", hr);
+
+    /* Only first Position keys are not removed. */
+    hr = IDirect3DRMAnimation_DeleteKey(animation, 0.0f);
+    ok(SUCCEEDED(hr), "Failed to delete keys, hr %#x.\n", hr);
+
+    count = 0;
+    memset(keys, 0, sizeof(keys));
+    hr = IDirect3DRMAnimation2_GetKeys(animation2, 0.0f, 100.0f, &count, keys);
+    ok(SUCCEEDED(hr), "Failed to get key count, hr %#x.\n", hr);
+    ok(count == 6, "Unexpected key count %u.\n", count);
+
+    ok(keys[0].dwKeyType == D3DRMANIMATION_ROTATEKEY, "Unexpected key type %u.\n", keys[0].dwKeyType);
+    ok(keys[1].dwKeyType == D3DRMANIMATION_POSITIONKEY, "Unexpected key type %u.\n", keys[1].dwKeyType);
+    ok(keys[2].dwKeyType == D3DRMANIMATION_POSITIONKEY, "Unexpected key type %u.\n", keys[2].dwKeyType);
+    ok(keys[3].dwKeyType == D3DRMANIMATION_POSITIONKEY, "Unexpected key type %u.\n", keys[3].dwKeyType);
+    ok(keys[4].dwKeyType == D3DRMANIMATION_POSITIONKEY, "Unexpected key type %u.\n", keys[4].dwKeyType);
+    ok(keys[5].dwKeyType == D3DRMANIMATION_SCALEKEY, "Unexpected key type %u.\n", keys[5].dwKeyType);
+
+    ok(keys[0].dvTime == 0.0f, "Unexpected key time %.8e.\n", keys[0].dvTime);
+    ok(keys[1].dvTime == 0.0f, "Unexpected key time %.8e.\n", keys[1].dvTime);
+    ok(keys[2].dvTime == 0.0f, "Unexpected key time %.8e.\n", keys[2].dvTime);
+    ok(keys[3].dvTime == 80.0f, "Unexpected key time %.8e.\n", keys[3].dvTime);
+    ok(keys[4].dvTime == 99.0f, "Unexpected key time %.8e.\n", keys[4].dvTime);
+    ok(keys[5].dvTime == 0.0f, "Unexpected key time %.8e.\n", keys[5].dvTime);
+
+    hr = IDirect3DRMAnimation_DeleteKey(animation, 0.0f);
+    ok(SUCCEEDED(hr), "Failed to delete keys, hr %#x.\n", hr);
+
+    count = 0;
+    hr = IDirect3DRMAnimation2_GetKeys(animation2, 0.0f, 100.0f, &count, NULL);
+    ok(SUCCEEDED(hr), "Failed to get key count, hr %#x.\n", hr);
+    ok(count == 3, "Unexpected key count %u.\n", count);
+
     IDirect3DRMAnimation2_Release(animation2);
     IDirect3DRMAnimation_Release(animation);