How to access the repo that calls a shared action

In a GitHub shared action, is it possible to know the full name (with owner) of the repo from which the action has been called?

For instance with two repos:

• owner/caller/.github/actions/action1.yml

   ...
  
   steps:
        - name: Checkout action
          uses: actions/checkout@v4
          with:
            repository: owner/called
            ref: main
            path: ./shared-workflows
            sparse-checkout: .github/workflows
            sparse-checkout-cone-mode: false
  
        - name: Use reusable workflow2
          uses: ./shared-workflows/.github/workflows/shared
  

• owner/caller/.github/actions/called/action.yml:

  ...
  
  runs:
    using: "composite"
  
    steps:         
      - name: echo
        shell: bash
        run: |
          echo SOMETHING
  

And the shared action should echo owner/caller.

Example composition action:

# .github/actions/called/action.yml
name: "Called Action"
description: "An action that knows who called it"

runs:
  using: "composite"
  steps:
    - name: Echo caller repository
      shell: bash
      run: |
        echo "Caller repository: ${{ github.repository }}"
        echo "Caller owner: ${{ github.repository_owner }}"
        echo "Caller repo name: ${{ github.event.repository.name }}"

This allows your shared action to respond differently depending on the caller — useful for logging, access control, repo-specific logic, or telemetry.

Bonus point: If you're using this in a reusable workflow (via workflow_call), these variables still work, but if you're trying to explicitly pass these into a called action or workflow, you can also pass them as inputs:

# In the caller workflow
uses: owner/repo/.github/workflows/reusable.yml@main
with:
  caller_repo: ${{ github.repository }}