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