Wedding Banquet

Preparation
First of all to have your own wedding ceremony, you'll need to be already married to your partner. You will get free banquet reservations in new wedding packs, but you can also buy them separate from the boutique for 5 gold each. You'll need two of these to arrange your ceremony, one for both wife and husband.

To pick a date and time for your ceremony you'll need to teleport to the chapel foyer. To do this go to the Eldest Matchmaker in West Archosaur, choose Quest Related, then Chapel Foyer. Make sure you and your significant other are both in there, in squad with banquet reservations in your inventory.

Once you're in, speak to the Wedding Usher (the squad leader should do this) and choose the Register for a Wedding option. You'll need to look through the times and dates and pick which one suits you and your partner best, as this will cost 3 mil to cancel.

Next you'll need to invite your friends. Try to invite as many people as you can, I'll mention more about this later on.
You will receive 5 free invitations, after that they are 100k each. My suggestion for this is to get your friends to send you 100k if they would like to go to save yourself money. To make an invitation, speak to the Wedding Usher, choose Quest Related, then Blank Invitation. You'll need a blank one each time you invite someone. Go back to the main menu and choose Prepare Invitations. You'll need to type in your friends name EXACTLY as they spell it. Take note of capital I's and lowercase L's; ask if you aren't sure. Repeat this process as many times as needed.
Now you're fully prepared, time to wait.

Before the Ceremony
The day of your wedding make sure to remind everyone what time it's at beforehand. It's nice to get everyone in the foyer 15-30 minutes before your ceremony to make sure everyone has invites. Remind everyone how to get in; it's the same way you went in to prepare your invites. I suggest getting everyone buffed before the ceremony; this is a good place to do it. You and your partner will need to be in a squad alone with the groom as lead. Once the time of the ceremony comes, everyone can right click their invitations to enter the wedding chapel.

The Ceremony
Once you enter at the Wedding Planner, the bride should take a quest for the Bride's Corsage, the groom should take the Groom's Corsage, and the guests take the Guest's Corsage. Keep in mind that everyone needs one of these in their inventory for the ceremony, and they cost 20k each. The bride and groom will also receive a temporary set of wedding fashion.

Oaths
At this point there should be a quest for the groom to take, I believe its called Service: Bless and Toss. After the groom has taken that quest everyone should receive a public quest on the right side of their screen. This is waiting time - 3 minutes until the oaths. After the 3 minutes are up, you should see some red text with the oaths, there will be two separate blocks of it.

Fighting
The Jealous Ex will be summoned automatically sometime after this: be prepared. He will show up behind smaller mobs called Wedding Crashers. Those shouldn't take very long to kill, and then everyone should move to the Jealous Ex. It has 30mil HP, which shouldn't take long to knock out if you have enough people. CAUTION: The groom and bride should NOT attack any of the mobs or boss otherwise the quest will fail. This boss can be summoned multiple times for more contribution, but it costs 6mil per summon. If no one wants to do this then the groom should continue the quest at the Wedding Planner. There should be some more red text here and waiting.

Exchanging Rings
Now you should see two mines at the front. The groom should dig the one labeled the bride's ring box and the bride should dig the one labeled the groom's ring box. After you both have a ring in your inventory, you'll need to do a trade and trade them to each other. I think there is a quest the groom needs to continue here.

Throwing the Bouquet
This is where the bride takes the bouquet quest from Father Derrial. Bouquets will show up behind the seats which u can dig; everyone should try to get as many of these as possible since they give contribution. Each Real Bouquet is worth 500 points, the Bouquet Petals are worth 50, and the Bouquet Ribbons are worth 30.

Some more info about this though, if you look at the corsage in your inventory (if you got it as soon as you entered) it will have the correct time on it showing how long is left until the ceremony ends. If the groom does not end the ceremony before time is up everyone will be kicked out and rewards will not be received.

Rewards
Everyone who participated and earned at least 100 contribution will receive a reward box at the end. The prizes are: Mirage Celestones, Untradeable Random Pigments, and Hyper Stones. Also to check your contribution, you can click the scroll icon next to your public quest on your screen.

The prizes for the groom and bride vary depending on the amount of total contribution. They are at 30k, 60k, and 100k, and there will be some red text alerting you of when/if the numbers are reached.

30k – Ring that gives u a bless box for +2 attack and +2 defense.
60k –
100k – permanent set of the wedding fashion. (You need to summon the Jealous Ex 9 times and dig to reach 100k contribution.)