diff --git a/.github/actions/release-pr-bot/manage-release-pr.js b/.github/actions/release-pr-bot/manage-release-pr.js
index 05d7fab..f007f1b 100644
--- a/.github/actions/release-pr-bot/manage-release-pr.js
+++ b/.github/actions/release-pr-bot/manage-release-pr.js
@@ -101,17 +101,25 @@ async function fetchUnreleasedPRs({
   )
 }
 
+function involvedLogins(pr) {
+  const logins = [pr.user?.login, ...(pr.assignees ?? []).map((a) => a?.login)]
+  return [...new Set(logins.filter(Boolean))]
+}
+
 function buildReviewers(prs) {
   const logins = prs
-    .map((pr) => pr.user?.login)
-    .filter((login) => login && !login.includes('[bot]'))
+    .flatMap(involvedLogins)
+    .filter((login) => !login.includes('[bot]'))
   return [...new Set(logins)]
 }
 
 function buildBody(prs, mainBranch, developBranch) {
-  const prLines = prs.map(
-    (pr) => `- #${pr.number} — ${pr.title} (@${pr.user?.login})`,
-  )
+  const prLines = prs.map((pr) => {
+    const mentions = involvedLogins(pr)
+      .map((login) => `@${login}`)
+      .join(', ')
+    return `- #${pr.number} — ${pr.title} (${mentions})`
+  })
   return [
     '## 🚀 Release PR',
     '',
diff --git a/.github/actions/release-pr-bot/manage-release-pr.test.js b/.github/actions/release-pr-bot/manage-release-pr.test.js
index a90b0d1..94d2fc3 100644
--- a/.github/actions/release-pr-bot/manage-release-pr.test.js
+++ b/.github/actions/release-pr-bot/manage-release-pr.test.js
@@ -120,4 +120,52 @@ describe('manage-release-pr', () => {
     expect(github.rest.pulls.create).toHaveBeenCalled()
     expect(github.rest.pulls.requestReviewers).not.toHaveBeenCalled()
   })
+
+  it('includes assignees of PRs as reviewers and mentions', async () => {
+    const github = makeGithub({
+      commits: [{ sha: 'abc123' }],
+      mergedPRs: [
+        {
+          ...unreleasedPR,
+          user: { login: 'gateway-bot[bot]' },
+          assignees: [{ login: 'bob' }],
+        },
+      ],
+      openPRs: [],
+    })
+
+    await run({ github, context: makeContext() })
+
+    expect(github.rest.pulls.requestReviewers).toHaveBeenCalledWith(
+      expect.objectContaining({ reviewers: ['bob'] }),
+    )
+    expect(github.rest.pulls.create).toHaveBeenCalledWith(
+      expect.objectContaining({
+        body: expect.stringContaining('(@gateway-bot[bot], @bob)'),
+      }),
+    )
+  })
+
+  it('deduplicates authors and assignees across PRs', async () => {
+    const github = makeGithub({
+      commits: [{ sha: 'abc123' }, { sha: 'def456' }],
+      mergedPRs: [
+        { ...unreleasedPR, assignees: [{ login: 'alice' }] },
+        {
+          ...unreleasedPR,
+          number: 2,
+          merge_commit_sha: 'def456',
+          user: { login: 'gateway-bot[bot]' },
+          assignees: [{ login: 'alice' }],
+        },
+      ],
+      openPRs: [],
+    })
+
+    await run({ github, context: makeContext() })
+
+    expect(github.rest.pulls.requestReviewers).toHaveBeenCalledWith(
+      expect.objectContaining({ reviewers: ['alice'] }),
+    )
+  })
 })
diff --git a/README.md b/README.md
index c9044d9..c7c6d22 100644
--- a/README.md
+++ b/README.md
@@ -2,7 +2,6 @@
 
 [ra.co](https://ra.co)
 
-
 This repo is used to house our organisation-wide health files, which can include `CONTRIBUTING`, `SUPPORT`, `CODE_OF_CONDUCT`, `ISSUE_TEMPLATE`(S), or `PULL_REQUEST_TEMPLATE`(S). If another organisation repo doesn't include one of these files, it will fallback to the one found in this repo.
 
 See [here](https://github.blog/changelog/2019-02-21-organization-wide-community-health-files/) for more info.
@@ -16,8 +15,8 @@ This repo houses reusable GitHub Actions that any repo in the organisation can r
 Automatically creates or updates a release PR from `develop` → `main`. Each time it runs, it:
 
 - Finds all merged PRs on `develop` not yet in `main`
-- Builds a PR body listing each one with author
-- Auto-requests reviews from the authors of those PRs
+- Builds a PR body listing each one with its author and assignees
+- Auto-requests reviews from those authors and assignees
 - Updates the PR body and adds any new reviewers if the release PR already exists
 
 #### Usage
@@ -46,19 +45,19 @@ jobs:
 To use non-default branch names:
 
 ```yaml
-    steps:
-      - uses: resident-advisor/.github/.github/actions/release-pr-bot@v1.0.1
-        with:
-          main_branch: master
-          develop_branch: staging
+steps:
+  - uses: resident-advisor/.github/.github/actions/release-pr-bot@v1.0.1
+    with:
+      main_branch: master
+      develop_branch: staging
 ```
 
 #### Inputs
 
-| Input            | Default   | Description                  |
-| ---------------- | --------- | ---------------------------- |
-| `main_branch`    | `main`    | The branch to release into   |
-| `develop_branch` | `develop` | The branch being released    |
+| Input            | Default   | Description                |
+| ---------------- | --------- | -------------------------- |
+| `main_branch`    | `main`    | The branch to release into |
+| `develop_branch` | `develop` | The branch being released  |
 
 ## Releasing New Action Versions