The basic method depends on which app you're using
Adding a person to a group text works differently on iMessage, Android Messages, WhatsApp, and other apps — but the principle is the same on all of them. You open the conversation, find the option to add members (usually called "Add" or "Members"), type or select the contact's name, and confirm. The new person then sees the full conversation history, so they can read what was said before they joined.
The exact steps take 30 seconds once you know where the button is. The confusion usually comes from the button being in a different place on each platform, and from not knowing whether the person will see old messages. They will.
Key Takeaways
- On iMessage, tap the group name at the top of the conversation, then tap "Add Contact" or the plus icon to add someone.
- On Android Messages, open the conversation, tap the three dots at the top, select "Group details," and tap the plus icon next to members.
- On WhatsApp, open the group, tap the group name at the top, scroll to "Participants," and tap the plus icon to add a contact.
- The new person will see all previous messages in the conversation once they are added, so you do not need to catch them up manually.
- If you cannot add someone, check whether they have the same app installed and whether you have their correct phone number or username.
Adding someone on iMessage (iPhone, iPad, Mac)
Open the group conversation. At the very top of the screen, you will see the names of everyone in the group. Tap on that area — it might say "Group Name" or just show the contact names. This opens the group details panel.
Look for a button that says "Add Contact" or shows a plus sign (+). Tap it. A list of your contacts will appear. Find the person you want to add, tap their name, and then tap "Add." The conversation will update when ready, and the new member will receive a notification that they have been added to the group.
If you do not see an "Add Contact" button, make sure you are in a group text with at least three people. iMessage requires a group to have more than two people before you can add members. If it is just you and one other person, you cannot add a third person using this method — you would need to start a new group conversation instead.
Adding someone on Android Messages
Open the group conversation. At the top right of the screen, tap the three vertical dots (the menu icon). A dropdown menu will appear with several options.
Select "Group details." This opens a screen showing everyone currently in the conversation. You will see a section labeled "Participants" or "Members." Next to it, there should be a plus icon (+) or an "Add" button. Tap it.
Your contacts list will open. Find the person you want to add and tap their name. Confirm the addition if prompted. The new member will be added to the group and will see all previous messages in the conversation.
Adding someone on WhatsApp
Open the group conversation. At the top of the screen, tap the group name. This opens the group information panel.
Scroll down until you see the "Participants" section, which lists everyone currently in the group. At the top of the participants list, there is a plus icon (+). Tap it. Your contacts list will appear. Select the person you want to add and confirm.
The new member will receive a notification that they have been added and will see the full conversation history. If the person you want to add does not appear in your contacts list, make sure you have their phone number saved in your phone's contacts app first.
Adding someone on Facebook Messenger
Open the group conversation. At the top of the screen, you will see the group name and the names or profile pictures of members. Tap on the group name or the info icon (usually an "i" in a circle).
This opens the group details. Look for a section showing members or participants. There should be a plus icon or "Add people" button. Tap it, search for the person's name, and select them from the results. Confirm the addition.
On some versions of Messenger, you can also tap directly on the member icons at the top of the conversation and look for an add button there. If you cannot find the option, try tapping the group name instead of the icons.
What happens when you add someone to an existing conversation
The new person will see every message that was sent before they joined. They will not be left out of the conversation history. This is true on iMessage, Android Messages, WhatsApp, Facebook Messenger, and most other messaging apps.
The new member will receive a notification that they have been added to the group. On some apps, the notification will say who added them. They can then start participating in the conversation right away.
If you want to give them context about what was discussed before they joined, you can do that in a separate message, but it is not necessary — they can read the history themselves.
Troubleshooting: why you might not be able to add someone
If you tap the add button and nothing happens, or if you cannot find the person in your contacts list, check these things first. Make sure the person has the same app installed — you cannot add someone to a WhatsApp group if they do not have WhatsApp, for example. Make sure you have their correct phone number or username saved in your contacts.
If the person is in your contacts but still does not appear when you try to add them, try closing the app completely and opening it again. Sometimes the contacts list does not refresh when ready. If that does not work, restart your phone.
On some networks or with some accounts, there may be restrictions on group size. Most apps allow groups of 100 or more people, but if you are hitting a limit, the app will tell you. Check the app's settings or help section for the maximum group size.
Frequently Asked Questions
Will the new person see messages from before they were added?
Yes. On iMessage, Android Messages, WhatsApp, and Facebook Messenger, new members can see the entire conversation history once they are added. They will not miss anything that was said before they joined.
Can I add someone if they do not have the app installed?
No. If you are using WhatsApp, iMessage, or any other messaging app, the person must have that same app installed on their phone. If they do not, you will need to use a different method to contact them or ask them to read the app first.
What if I accidentally add the wrong person?
You can remove them. Open the group details, find their name in the participants list, and look for a remove or delete option (usually an X or a minus sign). Tap it to remove them from the group. They will receive a notification that they have been removed.
Can I add multiple people at once?
On most apps, you can add one person at a time. However, some versions of WhatsApp and Facebook Messenger allow you to select multiple contacts before confirming. Check your app's add members screen to see if multiple selection is available.
Do I need permission to add someone to a group?
On most apps, any group member can add new people. However, some groups have restrictions set by the creator or administrator. If you cannot find the add button, the group settings may not allow you to add members. Ask the group creator or administrator to add the person instead.