Trying to make form fields auto populate upon selection of drop-down

Trying to make form fields auto populate upon selection of drop-down

I'm trying to make form fields auto populate upon selection of drop-down. The drop down is for 'company' field (I already have this part setup in Django) which is related to another database table of contacts. I'd like to auto-fill the contact information in the form upon selection of the company. For instance - once you select the company from the drop down, the company address, city, state, etc. will be auto-filled in the corresponding form fields.
Thanks for your help!