diff --git a/.gitignore b/.gitignore
index 4bc5d393441..d2bfafe567f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -53,6 +53,7 @@ scripts/processDiagnosticMessages.js
 scripts/produceLKG.js
 scripts/importDefinitelyTypedTests/importDefinitelyTypedTests.js
 scripts/generateLocalizedDiagnosticMessages.js
+scripts/request-pr-review.js
 scripts/*.js.map
 scripts/typings/
 coverage/
diff --git a/Gulpfile.js b/Gulpfile.js
index 94212344d38..095ea5025c4 100644
--- a/Gulpfile.js
+++ b/Gulpfile.js
@@ -22,6 +22,9 @@ const copyright = "CopyrightNotice.txt";
 const cleanTasks = [];
 
 const buildScripts = () => buildProject("scripts");
+task("scripts", buildScripts);
+task("scripts").description = "Builds files in the 'scripts' folder.";
+
 const cleanScripts = () => cleanProject("scripts");
 cleanTasks.push(cleanScripts);
 
diff --git a/scripts/request-pr-review.ts b/scripts/request-pr-review.ts
new file mode 100644
index 00000000000..a9f83ee7e4f
--- /dev/null
+++ b/scripts/request-pr-review.ts
@@ -0,0 +1,73 @@
+/// <reference lib="esnext.asynciterable" />
+/// <reference lib="es2015.promise" />
+import octokit = require("@octokit/rest");
+import Octokit = octokit.Octokit;
+import minimist = require("minimist");
+
+const options = minimist(process.argv.slice(2), {
+    boolean: ["help"],
+    string: ["token", "pull", "reviewer", "owner", "repo"],
+    alias: {
+        pr: "pull",
+        h: "help",
+        ["?"]: "help"
+    },
+    default: {
+        token: process.env.GH_TOKEN,
+        pull: process.env.GH_PULL_NUMBER,
+        reviewer: process.env.REQUESTED_REVIEWER,
+        owner: "microsoft",
+        repo: "TypeScript"
+    }
+});
+
+if (options.help) {
+    printHelpAndExit(0);
+}
+
+if (!options.token || !options.pull || !options.reviewer || !options.owner || !options.repo) {
+    console.error("Invalid arguments");
+    printHelpAndExit(-1);
+}
+
+const pull_number = +options.pull;
+if (!isFinite(pull_number)) {
+    console.error("Invalid arguments");
+    printHelpAndExit(-2);
+}
+
+const reviewers = Array.isArray(options.reviewer) ? options.reviewer : [options.reviewer];
+
+main().catch(console.error);
+
+async function main() {
+    const gh = new Octokit({ auth: options.token });
+    const response = await gh.pulls.createReviewRequest({
+        owner: options.owner,
+        repo: options.repo,
+        pull_number,
+        reviewers,
+    });
+    if (response.status === 201) {
+        console.log(`Added ${reviewers.join(", ")} to ${response.data.url}`);
+    }
+    else {
+        console.log(`Failed to add ${reviewers.join(", ")} to the pull request.`);
+    }
+}
+
+function printHelpAndExit(exitCode: number) {
+    console.log(`
+usage: request-pr-review.js [options]
+
+options:
+    --token    <token>     Your GitHub auth token. Uses %GH_TOKEN% if present.
+    --owner    <owner>     The GH user or organization for the repo (default: 'microsoft').
+    --repo     <repo>      The GH repo for the pull request (default: 'TypeScript').
+    --pull     <pr_number> The pull request number. Uses %GH_PULL_NUMBER% if present.
+    --reviewer <reviewer>  The GH username of reviewer to add. May be specified multiple times.
+                           Uses %REQUESTED_REVIEWER% if present.
+ -h --help                 Prints this help message.
+`);
+    return process.exit(exitCode);
+}
\ No newline at end of file
diff --git a/scripts/tsconfig.json b/scripts/tsconfig.json
index e9699c3dc63..8383fbb0ff2 100644
--- a/scripts/tsconfig.json
+++ b/scripts/tsconfig.json
@@ -17,6 +17,7 @@
         "configurePrerelease.ts",
         "buildProtocol.ts",
         "produceLKG.ts",
-        "word2md.ts"
+        "word2md.ts",
+        "request-pr-review.ts"
     ]
 }