diff --git a/homeassistant/components/knocki/__init__.py b/homeassistant/components/knocki/__init__.py
index ef024d6f4d6..ddf389649f2 100644
--- a/homeassistant/components/knocki/__init__.py
+++ b/homeassistant/components/knocki/__init__.py
@@ -2,27 +2,18 @@
 
 from __future__ import annotations
 
-from dataclasses import dataclass
-
-from knocki import KnockiClient, KnockiConnectionError, Trigger
+from knocki import EventType, KnockiClient
 
 from homeassistant.config_entries import ConfigEntry
 from homeassistant.const import CONF_TOKEN, Platform
 from homeassistant.core import HomeAssistant
-from homeassistant.exceptions import ConfigEntryNotReady
 from homeassistant.helpers.aiohttp_client import async_get_clientsession
 
+from .coordinator import KnockiCoordinator
+
 PLATFORMS: list[Platform] = [Platform.EVENT]
 
-type KnockiConfigEntry = ConfigEntry[KnockiData]
-
-
-@dataclass
-class KnockiData:
-    """Knocki data."""
-
-    client: KnockiClient
-    triggers: list[Trigger]
+type KnockiConfigEntry = ConfigEntry[KnockiCoordinator]
 
 
 async def async_setup_entry(hass: HomeAssistant, entry: KnockiConfigEntry) -> bool:
@@ -31,12 +22,15 @@ async def async_setup_entry(hass: HomeAssistant, entry: KnockiConfigEntry) -> bo
         session=async_get_clientsession(hass), token=entry.data[CONF_TOKEN]
     )
 
-    try:
-        triggers = await client.get_triggers()
-    except KnockiConnectionError as exc:
-        raise ConfigEntryNotReady from exc
+    coordinator = KnockiCoordinator(hass, client)
 
-    entry.runtime_data = KnockiData(client=client, triggers=triggers)
+    await coordinator.async_config_entry_first_refresh()
+
+    entry.async_on_unload(
+        client.register_listener(EventType.CREATED, coordinator.add_trigger)
+    )
+
+    entry.runtime_data = coordinator
 
     await hass.config_entries.async_forward_entry_setups(entry, PLATFORMS)
 
diff --git a/homeassistant/components/knocki/coordinator.py b/homeassistant/components/knocki/coordinator.py
new file mode 100644
index 00000000000..020b3921a1e
--- /dev/null
+++ b/homeassistant/components/knocki/coordinator.py
@@ -0,0 +1,34 @@
+"""Update coordinator for Knocki integration."""
+
+from knocki import Event, KnockiClient, KnockiConnectionError, Trigger
+
+from homeassistant.core import HomeAssistant
+from homeassistant.helpers.update_coordinator import DataUpdateCoordinator, UpdateFailed
+
+from .const import DOMAIN, LOGGER
+
+
+class KnockiCoordinator(DataUpdateCoordinator[dict[int, Trigger]]):
+    """The Knocki coordinator."""
+
+    def __init__(self, hass: HomeAssistant, client: KnockiClient) -> None:
+        """Initialize the coordinator."""
+        super().__init__(
+            hass,
+            logger=LOGGER,
+            name=DOMAIN,
+        )
+        self.client = client
+
+    async def _async_update_data(self) -> dict[int, Trigger]:
+        try:
+            triggers = await self.client.get_triggers()
+        except KnockiConnectionError as exc:
+            raise UpdateFailed from exc
+        return {trigger.details.trigger_id: trigger for trigger in triggers}
+
+    def add_trigger(self, event: Event) -> None:
+        """Add a trigger to the coordinator."""
+        self.async_set_updated_data(
+            {**self.data, event.payload.details.trigger_id: event.payload}
+        )
diff --git a/homeassistant/components/knocki/event.py b/homeassistant/components/knocki/event.py
index 8cd5de21958..adaf344e468 100644
--- a/homeassistant/components/knocki/event.py
+++ b/homeassistant/components/knocki/event.py
@@ -3,7 +3,7 @@
 from knocki import Event, EventType, KnockiClient, Trigger
 
 from homeassistant.components.event import EventEntity
-from homeassistant.core import HomeAssistant
+from homeassistant.core import HomeAssistant, callback
 from homeassistant.helpers.device_registry import DeviceInfo
 from homeassistant.helpers.entity_platform import AddEntitiesCallback
 
@@ -17,10 +17,26 @@ async def async_setup_entry(
     async_add_entities: AddEntitiesCallback,
 ) -> None:
     """Set up Knocki from a config entry."""
-    entry_data = entry.runtime_data
+    coordinator = entry.runtime_data
+
+    added_triggers = set(coordinator.data)
+
+    @callback
+    def _async_add_entities() -> None:
+        current_triggers = set(coordinator.data)
+        new_triggers = current_triggers - added_triggers
+        added_triggers.update(new_triggers)
+        if new_triggers:
+            async_add_entities(
+                KnockiTrigger(coordinator.data[trigger], coordinator.client)
+                for trigger in new_triggers
+            )
+
+    coordinator.async_add_listener(_async_add_entities)
 
     async_add_entities(
-        KnockiTrigger(trigger, entry_data.client) for trigger in entry_data.triggers
+        KnockiTrigger(trigger, coordinator.client)
+        for trigger in coordinator.data.values()
     )
 
 
diff --git a/tests/components/knocki/test_event.py b/tests/components/knocki/test_event.py
index a53e2811854..4740ddc9167 100644
--- a/tests/components/knocki/test_event.py
+++ b/tests/components/knocki/test_event.py
@@ -7,13 +7,14 @@ from knocki import Event, EventType, Trigger, TriggerDetails
 import pytest
 from syrupy import SnapshotAssertion
 
+from homeassistant.components.knocki.const import DOMAIN
 from homeassistant.const import STATE_UNKNOWN
 from homeassistant.core import HomeAssistant
 from homeassistant.helpers import entity_registry as er
 
 from . import setup_integration
 
-from tests.common import MockConfigEntry, snapshot_platform
+from tests.common import MockConfigEntry, load_json_array_fixture, snapshot_platform
 
 
 async def test_entities(
@@ -73,3 +74,25 @@ async def test_subscription(
     await hass.async_block_till_done()
 
     assert mock_knocki_client.register_listener.return_value.called
+
+
+async def test_adding_runtime_entities(
+    hass: HomeAssistant,
+    mock_knocki_client: AsyncMock,
+    mock_config_entry: MockConfigEntry,
+) -> None:
+    """Test we can create devices on runtime."""
+    mock_knocki_client.get_triggers.return_value = []
+
+    await setup_integration(hass, mock_config_entry)
+
+    assert not hass.states.get("event.knc1_w_00000214_aaaa")
+
+    add_trigger_function: Callable[[Event], None] = (
+        mock_knocki_client.register_listener.call_args[0][1]
+    )
+    trigger = Trigger.from_dict(load_json_array_fixture("triggers.json", DOMAIN)[0])
+
+    add_trigger_function(Event(EventType.CREATED, trigger))
+
+    assert hass.states.get("event.knc1_w_00000214_aaaa") is not None