dj at Rehearsal?

Usually it’s just the wedding party and officiant and/or coordinator

I’ve never seen a DJ attend the rehearsal.

Nope. My DJ didn’t come

We hired a DJ/musician and he had to be there to get everyone to walk/practice to the music so to speak, make sure the church's sound system worked with his equipment and to pick up on our vibe. Also it was in our contract, rehearsal, ceremony and reception.