Hair & makeup trial

The hair and makeup trial typically only covers the bride, though if any bridesmaids are interested in a trial, they may be able to pay for one too, just check with the hair/makeup artist. You can usually bring someone with you to get their opinion on how everything looks on you, any adjustments needed, etc. If you have any hair pieces or veils that you're planning to wear, be sure to bring those with, along with any inspiration photos of what you're looking for. Don't be afraid to say if you don't like something, or want any changes for your wedding day. This is just a test run to see if you're happy with how everything looks, and they'll want to know what you like/dislike.

View Quoted Comment You totally nailed it!
One thing I would add, have them take some photos of you so you get an idea of how it'll look in photos

Hi Miki! Like Lisa said it's just for you, and I'd definitely recommend bringing a few photos to show the style of makeup and hair you like! You should be vocal during your trial and make sure that you try different adjustments so that you love the final result. The trial is all about figuring it out and deciding on your final look so that the stylist can recreate it on the wedding day without guesswork!

Here's a great article to read with in-depth info:

Your Wedding Makeup & Hair Trial: What to Expect

The hair trial run mainly is more for the bride.