How to Cast a Murder Mystery Party With an Uneven Male and Female Ratio

You count the yes replies and the split is nothing like even. 12 women, 4 men, and a character list you haven’t opened yet because you already suspect it won’t fit. Friendship groups aren’t balanced, plus-ones drop out, and the people who answer an invitation first are rarely the people who make the numbers work.

Every MortalCase murder mystery game has 20 characters: 8 required Primary Characters that carry the story and the 3 murders, and 12 Secondary Characters you cast as your guest list allows. I write gender-neutral characters into the games for this reason, because the guest list a host is holding is never as tidy as a cast list. An uneven room is the ordinary case here, and it is planned for.

Count the roles you have to fill

Only 8 of the 20 are compulsory. The 8 Primary Characters carry the story and the 3 murders between them, so every one of those roles needs a guest. The other 12 are yours to pick from, and that is the part most hosts don’t realise they are allowed to touch.

With 16 confirmed guests you are covering the 8 required roles and choosing 8 of the 12 optional ones. You choose which 8. If some of the optional characters don’t suit anybody on your list, leave them in the folder and take different ones instead. A MortalCase game runs with 8 to 20 players, so the cast bends to the room you have rather than the other way round. Hosting for 15 to 20 guests covers the space and timing side if your list runs to the top end.

Use the gender-neutral characters where they buy you the most room

Open the character list and mark it up before you assign anybody. Some characters are written as men, some as women, and some are written so that anyone can play them. That last group is your flexibility, and spending it early is the mistake worth avoiding. Place the fixed roles first, starting from the smaller side of your guest list, and let the gender-neutral characters absorb whatever is left over.

With 4 men confirmed, check whether any of the 8 required roles is written as a man, and cover those while you still have all 4 to place. Then work outward into the optional 12.

“The only thing I wish is that the characters that can be male or female had the descriptions for each just to make it easier for that character and while you’re reading it out loud. I had more female characters so I had to be very strategic on who I assigned roles to.”

Strategic is the right word for it. The deciding happens quietly at your kitchen table days before anyone arrives, which is the best possible time for it to happen. The wish in that same review is fair, and I would rather leave it on the page than tidy it away.

12 women and 4 men, worked through

Say 16 people have confirmed. Cover any required role that is written as a man first, then hand the rest of the 8 to the guests you trust to arrive on time and stay for the full 2.5–3 hours. Fill what remains from the optional 12, taking the characters that suit the people in front of you and leaving the ones that don’t.

If you are 1 or 2 roles short of a comfortable fit, ask. Someone who is happy to play a character written as a man will tell you so in a sentence, and someone who would rather not will tell you that too. You won’t get that answer by guessing, and you don’t need to guess.

Plan a bachelorette or a bridal shower and the list often has no men on it at all, so a mystery cast for the bride’s guest list starts from who’s coming rather than from the theme.

Ask, then assign

Send a short message before you place anybody: say that the game has characters of every kind in it, and ask whether they have a preference. Some will say they don’t mind at all. Others will tell you they would rather not play a character with a romance attached, or would rather not be written as somebody’s husband, and both of those are easy to work with once you have them in writing.

Keep what they tell you to yourself. Casting notes are private, and something a guest said in confidence should never surface in the group chat. My full casting guide takes the method further, including what to do when somebody cancels the night before, and if one of your guests is nervous about the social side rather than the character, this one is written for them.

What a guest is holding on the night

No one has to memorise anything. Each guest gets a private Character Guide with their role and biography, Things to Share, Secrets to Hide, Important Relationships, a Secret Task, Prop Suggestions and an optional Create Drama idea. It is a page to work from rather than lines to learn, and it belongs to that guest alone.

There’s no accent to attempt and no script to follow. Freeplay means your guests move around and choose their own conversations, so a guest playing a character written as a man spends the evening asking questions and holding things back, the same as everybody else in the room. How my games work covers the structure underneath all of that.

Costume is optional, and so is the match

Costume is optional in my games. Someone can arrive in what they were already wearing and lose nothing, and the Character Guide carries a Prop Suggestions field that names something to bring or wear, so most of that decision is made before they even ask. A guest playing a character written as a man can put on a jacket and call it done.

Anyone can turn up to GAME OVER – 80’s Arcade Theme in neon and high-tops, and the outfit won’t announce which character they were handed.

Cast on comfort and on the material the character is carrying. What the character looks like in your head can come last, or not at all.

Send the guides, then stop counting

Once the roles are placed, send each guest their own guide privately and give them a few days with it. A guest who has read the guide twice arrives already suspicious of somebody, and that is the best start an evening can get. Getting your guests excited beforehand covers what to send and when.

Then put the tally away. Your guests will spend the evening accusing each other and defending themselves, and not one of them will be counting how many men are in the room.