How to set virtualenv for a crontab?

Is there something equivalent I could do in crontab to activate a virtualenv?

This works well for me…

## call virtualenv python from crontab
0    9    *    *    *    /path/to/virtenv/bin/python /path/to/your_cron_script.py

I prefer using python directly from the virtualenv instead of hard-coding the virtualenv $PATH into the script’s shebang… or sourcing the venv activate