diff --git a/.gitmodules b/.gitmodules
index afde4d34f36..bb4b749beee 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -42,3 +42,12 @@
 	path = third_party/libcxx
 	url = https://github.com/llvm-mirror/libcxx.git
 	branch = release_60
+[submodule "third_party/data-plane-api"]
+	path = third_party/data-plane-api
+	url = https://github.com/envoyproxy/data-plane-api.git
+[submodule "third_party/googleapis"]
+	path = third_party/googleapis
+	url = https://github.com/googleapis/googleapis.git
+[submodule "third_party/protoc-gen-validate"]
+	path = third_party/protoc-gen-validate
+	url = https://github.com/lyft/protoc-gen-validate.git
diff --git a/third_party/data-plane-api b/third_party/data-plane-api
new file mode 160000
index 00000000000..911001cdca0
--- /dev/null
+++ b/third_party/data-plane-api
@@ -0,0 +1 @@
+Subproject commit 911001cdca003337bdb93fab32740cde61bafee3
diff --git a/third_party/googleapis b/third_party/googleapis
new file mode 160000
index 00000000000..80ed4d0bbf6
--- /dev/null
+++ b/third_party/googleapis
@@ -0,0 +1 @@
+Subproject commit 80ed4d0bbf65d57cc267dfc63bd2584557f11f9b
diff --git a/third_party/protoc-gen-validate b/third_party/protoc-gen-validate
new file mode 160000
index 00000000000..e143189bf6f
--- /dev/null
+++ b/third_party/protoc-gen-validate
@@ -0,0 +1 @@
+Subproject commit e143189bf6f37b3957fb31743df6a1bcf4a8c685
diff --git a/tools/run_tests/sanity/check_submodules.sh b/tools/run_tests/sanity/check_submodules.sh
index 8ea53dfec5c..fa2628f18ea 100755
--- a/tools/run_tests/sanity/check_submodules.sh
+++ b/tools/run_tests/sanity/check_submodules.sh
@@ -32,11 +32,14 @@ cat << EOF | awk '{ print $1 }' | sort > "$want_submodules"
  b29b21a81b32ec273f118f589f46d56ad3332420 third_party/boringssl (remotes/origin/chromium-stable)
  afc30d43eef92979b05776ec0963c9cede5fb80f third_party/boringssl-with-bazel (fips-20180716-116-gafc30d43e)
  3be1924221e1326df520f8498d704a5c4c8d0cce third_party/cares/cares (cares-1_13_0)
+ 911001cdca003337bdb93fab32740cde61bafee3 third_party/data-plane-api (heads/master)
  30dbc81fb5ffdc98ea9b14b1918bfe4e8779b26e third_party/gflags (v2.2.0-5-g30dbc81)
+ 80ed4d0bbf65d57cc267dfc63bd2584557f11f9b third_party/googleapis (common-protos-1_3_1-915-g80ed4d0bb)
  ec44c6c1675c25b9827aacd08c02433cccde7780 third_party/googletest (release-1.8.0)
  6599cac0965be8e5a835ab7a5684bbef033d5ad0 third_party/libcxx (heads/release_60)
  9245d481eb3e890f708ff2d7dadf2a10c04748ba third_party/libcxxabi (heads/release_60)
  48cb18e5c419ddd23d9badcfe4e9df7bde1979b2 third_party/protobuf (v3.6.0.1-37-g48cb18e5)
+ e143189bf6f37b3957fb31743df6a1bcf4a8c685 third_party/protoc-gen-validate (v0.0.10)
  cacf7f1d4e3d44d871b605da3b647f07d718623f third_party/zlib (v1.2.11)
 EOF