GDPR Data Controller Processor etc

Can someone help me, I have the events booking component on my site. I am about to work with a partner who will also be using the events booking component on my site. Could someone tell me, am I correct in believing they are data controller and I'm the data processor because its my site?

Thanks for any help

Honestly, I don't know answer for this question. I guess you might need to ask someone who understand GDPR (maybe people around you).

Tuan