diff --git a/.github/workflows/main-reviewer.yml b/.github/workflows/main-reviewer.yml
new file mode 100644
index 000000000..33959d7b2
--- /dev/null
+++ b/.github/workflows/main-reviewer.yml
@@ -0,0 +1,26 @@
+# This workflows print a message to give the Main Reviewer a checklist (before merge)
+
+name: Main Reviewer Checklist
+
+on:
+  pull_request:
+    types: [assigned]
+
+jobs:
+  checklist:
+    # Not totally sure we need this
+    runs-on: ubuntu-18.04
+
+    steps:
+    - name: Replace reviewer name in message template
+      uses: falnyr/replace-env-vars-action@master
+      env:
+      # This is a wild guess. Probably it's also wrong.
+        MAINREV: ${{ github.event.issue.assignees }}
+      with: .github/workflows/main_rev_checklist.md
+    - name: Post filled template as comment
+      uses: harupy/comment-on-pr@master
+      env:
+        GITHUB_TOKEN: ${{ secrets.GH_TOKEN }}
+      with:
+        filename: main_rev_checklist.md
diff --git a/.github/workflows/main_rev_checklist.md b/.github/workflows/main_rev_checklist.md
new file mode 100644
index 000000000..cab32aecd
--- /dev/null
+++ b/.github/workflows/main_rev_checklist.md
@@ -0,0 +1,25 @@
+Hello @__MAINREV__!
+
+You've been assigned to this PR, which means that you've been nominated Main Reviewer! (Lucky you! :ta-da: :ta-da: :ta-da:)
+
+As a Main Reviewer, you are a bit more responsible for the quality of this PR and of the project in general than your fellow Reviewers. If you have any doubt, check [this section on reviewing](https://phys2bids.readthedocs.io/en/latest/contributorfile.html#reviewing) and [this section on being the Main Reviewer](https://phys2bids.readthedocs.io/en/latest/contributorfile.html#mainreviewer) of the documents.
+
+Before merging this PR, please check that:
+- [ ] The PR passes all the CircleCI/Azure tests.
+- [ ] The content respects the [Style Guide](https://phys2bids.readthedocs.io/en/latest/contributorfile.html#styling).
+- [ ] If the PR contains documentation, your local build is right.
+- If the PR contains code changes:
+    - [ ] Content and changes are adequately documented in the docstrings.
+    - [ ] User documentation is being updated accordingly - or a related issue has been opened.
+    - [ ] The adequate tests have been added/updated - or a related issue has been opened *if coverage doesn't drop below 90%*.
+- [ ] The PR and the reviews are harmonious with the rest of the repository, especially in that **they don't introduce repetitions**
+- [ ] The title of the PR is clear enough to describe a release content.
+- [ ] The labels are correct - and they will (or won't) trigger the correct `auto` release.
+- [ ] The PR received the amount of approvals necessaries to be merged.
+
+After you merged this PR, please check that:
+- [ ] The Author(s) and Reviewers contributions have been updated in the README.
+- [ ] The updates (in code, tests and documentation) have appened correctly.
+- [ ] If they had to, the tag was created, the release was cut, and the pypi version got updated.
+
+Thank you!
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