diff --git a/.github/workflows/cc_bot.yml b/.github/workflows/cc_bot.yml
new file mode 100644
index 000000000000..dd50eba79358
--- /dev/null
+++ b/.github/workflows/cc_bot.yml
@@ -0,0 +1,46 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+
+# GH actions.
+# We use it to cover windows and mac builds
+# Jenkins is still the primary CI
+
+name: PR
+
+on:
+  # See https://docs.github.com/en/actions/using-workflows/events-that-trigger-workflows#pull_request_target
+  pull_request_target:
+    types: [assigned, opened, synchronize, reopened, edited, ready_for_review]
+
+concurrency:
+  group: PR-${{ github.event.pull_request.number }}
+  cancel-in-progress: true
+
+jobs:
+  cc-reviewers:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          submodules: "recursive"
+      - name: Add cc'ed reviewers
+        env:
+          PR: ${{ toJson(github.event.pull_request) }}
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          set -eux
+          python tests/scripts/github_cc_reviewers.py
diff --git a/tests/python/unittest/test_ci.py b/tests/python/unittest/test_ci.py
index ac7e6cdd7c29..0c80617985ee 100644
--- a/tests/python/unittest/test_ci.py
+++ b/tests/python/unittest/test_ci.py
@@ -18,6 +18,7 @@
 import pathlib
 import subprocess
 import sys
+import json
 import tempfile
 
 import pytest
@@ -25,6 +26,33 @@
 REPO_ROOT = pathlib.Path(__file__).resolve().parent.parent.parent.parent
 
 
+def test_cc_reviewers():
+    reviewers_script = REPO_ROOT / "tests" / "scripts" / "github_cc_reviewers.py"
+
+    def run(pr_body, expected_reviewers):
+        proc = subprocess.run(
+            [str(reviewers_script), "--dry-run"],
+            stdout=subprocess.PIPE,
+            stderr=subprocess.PIPE,
+            env={"PR": json.dumps({"number": 1, "body": pr_body})},
+            encoding="utf-8",
+        )
+        if proc.returncode != 0:
+            raise RuntimeError(f"Process failed:\nstdout:\n{proc.stdout}\n\nstderr:\n{proc.stderr}")
+
+        assert proc.stdout.strip().endswith(f"Adding reviewers: {expected_reviewers}")
+
+    run(pr_body="abc", expected_reviewers=[])
+    run(pr_body="cc @abc", expected_reviewers=["abc"])
+    run(pr_body="cc @", expected_reviewers=[])
+    run(pr_body="cc @abc @def", expected_reviewers=["abc", "def"])
+    run(pr_body="some text cc @abc @def something else", expected_reviewers=["abc", "def"])
+    run(
+        pr_body="some text cc @abc @def something else\n\n another cc @zzz z",
+        expected_reviewers=["abc", "def", "zzz"],
+    )
+
+
 def test_skip_ci():
     skip_ci_script = REPO_ROOT / "tests" / "scripts" / "git_skip_ci.py"
 
diff --git a/tests/scripts/git_skip_ci.py b/tests/scripts/git_skip_ci.py
index 73fcc6490ab8..c4b88676c34f 100755
--- a/tests/scripts/git_skip_ci.py
+++ b/tests/scripts/git_skip_ci.py
@@ -17,56 +17,9 @@
 # under the License.
 
 import os
-import json
 import argparse
-import subprocess
-import re
-from urllib import request
-from typing import Dict, Tuple, Any
 
-
-class GitHubRepo:
-    def __init__(self, user, repo, token):
-        self.token = token
-        self.user = user
-        self.repo = repo
-        self.base = f"https://api.github.com/repos/{user}/{repo}/"
-
-    def headers(self):
-        return {
-            "Authorization": f"Bearer {self.token}",
-        }
-
-    def get(self, url: str) -> Dict[str, Any]:
-        url = self.base + url
-        print("Requesting", url)
-        req = request.Request(url, headers=self.headers())
-        with request.urlopen(req) as response:
-            response = json.loads(response.read())
-        return response
-
-
-def parse_remote(remote: str) -> Tuple[str, str]:
-    """
-    Get a GitHub (user, repo) pair out of a git remote
-    """
-    if remote.startswith("https://"):
-        # Parse HTTP remote
-        parts = remote.split("/")
-        if len(parts) < 2:
-            raise RuntimeError(f"Unable to parse remote '{remote}'")
-        return parts[-2], parts[-1].replace(".git", "")
-    else:
-        # Parse SSH remote
-        m = re.search(r":(.*)/(.*)\.git", remote)
-        if m is None or len(m.groups()) != 2:
-            raise RuntimeError(f"Unable to parse remote '{remote}'")
-        return m.groups()
-
-
-def git(command):
-    proc = subprocess.run(["git"] + command, stdout=subprocess.PIPE, check=True)
-    return proc.stdout.decode().strip()
+from git_utils import git, GitHubRepo, parse_remote
 
 
 if __name__ == "__main__":
diff --git a/tests/scripts/git_utils.py b/tests/scripts/git_utils.py
new file mode 100644
index 000000000000..f2927f1e3ab7
--- /dev/null
+++ b/tests/scripts/git_utils.py
@@ -0,0 +1,95 @@
+#!/usr/bin/env python3
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+
+import json
+import subprocess
+import re
+from urllib import request
+from typing import Dict, Tuple, Any
+
+
+class GitHubRepo:
+    def __init__(self, user, repo, token):
+        self.token = token
+        self.user = user
+        self.repo = repo
+        self.base = f"https://api.github.com/repos/{user}/{repo}/"
+
+    def headers(self):
+        return {
+            "Authorization": f"Bearer {self.token}",
+        }
+
+    def graphql(self, query: str) -> Dict[str, Any]:
+        return self._post("https://api.github.com/graphql", {"query": query})
+
+    def _post(self, full_url: str, body: Dict[str, Any]) -> Dict[str, Any]:
+        print("Requesting", full_url)
+        req = request.Request(full_url, headers=self.headers(), method="POST")
+        req.add_header("Content-Type", "application/json; charset=utf-8")
+        data = json.dumps(body)
+        data = data.encode("utf-8")
+        req.add_header("Content-Length", len(data))
+
+        with request.urlopen(req, data) as response:
+            response = json.loads(response.read())
+        return response
+
+    def post(self, url: str, data: Dict[str, Any]) -> Dict[str, Any]:
+        return self._post(self.base + url, data)
+
+    def get(self, url: str) -> Dict[str, Any]:
+        url = self.base + url
+        print("Requesting", url)
+        req = request.Request(url, headers=self.headers())
+        with request.urlopen(req) as response:
+            response = json.loads(response.read())
+        return response
+
+    def delete(self, url: str) -> Dict[str, Any]:
+        url = self.base + url
+        print("Requesting", url)
+        req = request.Request(url, headers=self.headers(), method="DELETE")
+        with request.urlopen(req) as response:
+            response = json.loads(response.read())
+        return response
+
+
+def parse_remote(remote: str) -> Tuple[str, str]:
+    """
+    Get a GitHub (user, repo) pair out of a git remote
+    """
+    if remote.startswith("https://"):
+        # Parse HTTP remote
+        parts = remote.split("/")
+        if len(parts) < 2:
+            raise RuntimeError(f"Unable to parse remote '{remote}'")
+        return parts[-2], parts[-1].replace(".git", "")
+    else:
+        # Parse SSH remote
+        m = re.search(r":(.*)/(.*)\.git", remote)
+        if m is None or len(m.groups()) != 2:
+            raise RuntimeError(f"Unable to parse remote '{remote}'")
+        return m.groups()
+
+
+def git(command):
+    command = ["git"] + command
+    print("Running", command)
+    proc = subprocess.run(command, stdout=subprocess.PIPE, check=True)
+    return proc.stdout.decode().strip()
diff --git a/tests/scripts/github_cc_reviewers.py b/tests/scripts/github_cc_reviewers.py
new file mode 100755
index 000000000000..48420822ad55
--- /dev/null
+++ b/tests/scripts/github_cc_reviewers.py
@@ -0,0 +1,73 @@
+#!/usr/bin/env python3
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+
+import os
+import json
+import argparse
+import re
+from typing import Dict, Any, List
+
+
+from git_utils import git, GitHubRepo, parse_remote
+
+
+def find_reviewers(body: str) -> List[str]:
+    print(f"Parsing body:\n{body}")
+    matches = re.findall(r"(cc( @[-A-Za-z0-9]+)+)", body, flags=re.MULTILINE)
+    matches = [full for full, last in matches]
+
+    print("Found matches:", matches)
+    reviewers = []
+    for match in matches:
+        if match.startswith("cc "):
+            match = match.replace("cc ", "")
+        users = [x.strip() for x in match.split("@")]
+        reviewers += users
+
+    reviewers = set(x for x in reviewers if x != "")
+    return sorted(list(reviewers))
+
+
+if __name__ == "__main__":
+    help = "Add @cc'ed people in a PR body as reviewers"
+    parser = argparse.ArgumentParser(description=help)
+    parser.add_argument("--remote", default="origin", help="ssh remote to parse")
+    parser.add_argument(
+        "--dry-run",
+        action="store_true",
+        default=False,
+        help="run but don't send any request to GitHub",
+    )
+    args = parser.parse_args()
+
+    remote = git(["config", "--get", f"remote.{args.remote}.url"])
+    user, repo = parse_remote(remote)
+
+    pr = json.loads(os.environ["PR"])
+
+    number = pr["number"]
+    body = pr["body"]
+    if body is None:
+        body = ""
+
+    to_add = find_reviewers(body)
+    print("Adding reviewers:", to_add)
+
+    if not args.dry_run:
+        github = GitHubRepo(token=os.environ["GITHUB_TOKEN"], user=user, repo=repo)
+        github.post(f"pulls/{number}/requested_reviewers", {"reviewers": to_add})