Flight crew reported a cargo fire during cruise and a subsequent diversion to a nearby airport.

Narrative

We took off at XA:50 time heading to ZZZ. After we reached 10;000 feet; we were getting ready to start service we received a PA from our purser to report to our Flight Attendant stations. We received news that we had an [situation] that we had fire in the cargo area and we have 15 minutes to land in ZZZ1. Then our purser made an announcement for us to go to our demo positions and show passengers the brace positions. We briefed our Able Bodied Passengers (ABP's) and then took our jumpseats. We landed at XB:56 and then waited for the Captain's instructions. They instructed us to disarm our doors; and then arm our doors; and at the end they decided that we should disarm our doors because we didn't need to inflate the slides. We then received instructions to evacuate everyone through L2 door. Outside we had a lot of fire trucks waiting for us. We waited outside for about two hours while we waited for the fire trucks to extinguish the smoke in the cargo area. After about two hours we got back on the aircraft and the passengers got their bags. And then we had our debrief while waiting for our transportation to go to the hotel which took another two hours. The crew had an amazing communication and we did a great job; and everything went very smoothly.