diff --git a/src/models/actions/update/UpdateGroupContact.ts b/src/models/actions/update/UpdateGroupContact.ts
new file mode 100644
index 0000000..62d4149
--- /dev/null
+++ b/src/models/actions/update/UpdateGroupContact.ts
@@ -0,0 +1,98 @@
+import { IsEmail, IsNotEmpty, IsObject, IsOptional, IsPhoneNumber, IsString } from 'class-validator';
+import { getConnectionManager } from 'typeorm';
+import { config } from '../../../config';
+import { RunnerGroupNotFoundError } from '../../../errors/RunnerGroupErrors';
+import { Address } from '../../entities/Address';
+import { GroupContact } from '../../entities/GroupContact';
+import { RunnerGroup } from '../../entities/RunnerGroup';
+
+/**
+ * This classed is used to create a new Group entity from a json body (post request).
+ */
+export class UpdateGroupContact {
+    /**
+     * The updated contact's first name.
+     */
+    @IsNotEmpty()
+    @IsString()
+    firstname: string;
+
+    /**
+     * The updated contact's middle name.
+     */
+    @IsOptional()
+    @IsString()
+    middlename?: string;
+
+    /**
+     * The updated contact's last name.
+     */
+    @IsNotEmpty()
+    @IsString()
+    lastname: string;
+
+    /**
+     * The updated contact's address.
+     */
+    @IsOptional()
+    @IsObject()
+    address?: Address;
+
+    /**
+     * The updated contact's phone number.
+     * This will be validated against the configured country phone numer syntax (default: international).
+     */
+    @IsOptional()
+    @IsPhoneNumber(config.phone_validation_countrycode)
+    phone?: string;
+
+    /**
+     * The updated contact's email address.
+     */
+    @IsOptional()
+    @IsEmail()
+    email?: string;
+
+    /**
+     * The updated contacts's groups' ids.
+     * You can provide either one groupId or an array of groupIDs.
+     */
+    @IsOptional()
+    groups?: number[] | number
+
+
+    /**
+     * Get's all groups for this contact by their id's;
+     */
+    public async getGroups(): Promise<RunnerGroup[]> {
+        if (!this.groups) { return null; }
+        let groups = new Array<RunnerGroup>();
+        if (!Array.isArray(this.groups)) {
+            this.groups = [this.groups]
+        }
+        for (let group of this.groups) {
+            let found = await getConnectionManager().get().getRepository(RunnerGroup).findOne({ id: group });
+            if (!found) { throw new RunnerGroupNotFoundError(); }
+            groups.push(found);
+        }
+        return groups;
+    }
+
+    /**
+     * Updates a provided Donor entity based on this.
+     * @param contact the contact you want to update.
+     */
+    public async update(contact: GroupContact): Promise<GroupContact> {
+        contact.firstname = this.firstname; GroupContact
+        contact.middlename = this.middlename;
+        contact.lastname = this.lastname;
+        contact.phone = this.phone;
+        contact.email = this.email;
+        if (!this.address) { contact.address.reset(); }
+        else { contact.address = this.address; }
+        Address.validate(contact.address);
+        contact.groups = await this.getGroups();
+
+        return contact;
+    }
+}
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