diff --git a/marimo/_dependencies/dependencies.py b/marimo/_dependencies/dependencies.py
index b6585225bb4..29e68d97747 100644
--- a/marimo/_dependencies/dependencies.py
+++ b/marimo/_dependencies/dependencies.py
@@ -121,3 +121,8 @@ def has_anywidget() -> bool:
     def has_watchdog() -> bool:
         """Return True if watchdog is installed."""
         return importlib.util.find_spec("watchdog") is not None
+
+    @staticmethod
+    def has_ipython() -> bool:
+        """Return True if IPython is installed."""
+        return importlib.util.find_spec("IPython") is not None
diff --git a/marimo/_output/builder.py b/marimo/_output/builder.py
index f765cdce382..786f635be9d 100644
--- a/marimo/_output/builder.py
+++ b/marimo/_output/builder.py
@@ -93,6 +93,7 @@ def iframe(
         height: Optional[str] = None,
         style: Optional[str] = None,
         onload: Optional[str] = None,
+        **kwargs: str,
     ) -> str:
         params: List[Tuple[str, Union[str, None]]] = []
         if src:
@@ -107,6 +108,8 @@ def iframe(
             params.append(("style", style))
         if onload:
             params.append(("onload", onload))
+        for key, value in kwargs.items():
+            params.append((key, value))
 
         if len(params) == 0:
             return "<iframe />"
diff --git a/marimo/_output/formatters/formatter_factory.py b/marimo/_output/formatters/formatter_factory.py
index 75379d2fac3..9845ab286a6 100644
--- a/marimo/_output/formatters/formatter_factory.py
+++ b/marimo/_output/formatters/formatter_factory.py
@@ -2,7 +2,7 @@
 from __future__ import annotations
 
 import abc
-from typing import Optional
+from typing import Callable, Optional
 
 
 # Abstract base class for formatters that are installed at runtime.
@@ -20,9 +20,12 @@ def package_name() -> Optional[str]:
         raise NotImplementedError
 
     @abc.abstractmethod
-    def register(self) -> None:
+    def register(self) -> Callable[[], None] | None:
         """Registers formatters.
 
         Formatters can be registered using the formatters.formatter decorator.
+
+        Optionally returns a handle to undo side-effects, such as module
+        patches.
         """
         raise NotImplementedError
diff --git a/marimo/_output/formatters/formatters.py b/marimo/_output/formatters/formatters.py
index 8c135ae8640..9422d6f2a71 100644
--- a/marimo/_output/formatters/formatters.py
+++ b/marimo/_output/formatters/formatters.py
@@ -10,6 +10,7 @@
 from marimo._output.formatters.cell import CellFormatter
 from marimo._output.formatters.formatter_factory import FormatterFactory
 from marimo._output.formatters.holoviews_formatters import HoloViewsFormatter
+from marimo._output.formatters.ipython_formatters import IPythonFormatter
 from marimo._output.formatters.leafmap_formatters import LeafmapFormatter
 from marimo._output.formatters.matplotlib_formatters import MatplotlibFormatter
 from marimo._output.formatters.pandas_formatters import PandasFormatter
@@ -29,6 +30,7 @@
     LeafmapFormatter.package_name(): LeafmapFormatter(),
     BokehFormatter.package_name(): BokehFormatter(),
     HoloViewsFormatter.package_name(): HoloViewsFormatter(),
+    IPythonFormatter.package_name(): IPythonFormatter(),
     AnyWidgetFormatter.package_name(): AnyWidgetFormatter(),
 }
 
diff --git a/marimo/_output/formatters/ipython_formatters.py b/marimo/_output/formatters/ipython_formatters.py
new file mode 100644
index 00000000000..d6346bd3776
--- /dev/null
+++ b/marimo/_output/formatters/ipython_formatters.py
@@ -0,0 +1,60 @@
+# Copyright 2024 Marimo. All rights reserved.
+from __future__ import annotations
+
+import functools
+from typing import Any, Callable
+
+from marimo._messaging.mimetypes import KnownMimeType
+from marimo._output import builder
+from marimo._output.formatters.formatter_factory import FormatterFactory
+
+
+class IPythonFormatter(FormatterFactory):
+    @staticmethod
+    def package_name() -> str:
+        return "IPython"
+
+    def register(self) -> Callable[[], None]:
+        import IPython.display  # type:ignore
+
+        from marimo._output import formatting
+        from marimo._runtime.output import _output
+
+        old_display = IPython.display.display
+        # monkey patch IPython.display.display, which imperatively writes
+        # outputs to the frontend
+
+        @functools.wraps(old_display)
+        def display(*objs: Any, **kwargs: Any) -> None:
+            # IPython.display.display returns a DisplayHandle, which
+            # can be used to update the displayed object. We don't support
+            # that yet ...
+            if kwargs.pop("clear", False):
+                _output.clear()
+            for value in objs:
+                _output.append(value)
+
+        IPython.display.display = display
+
+        def unpatch() -> None:
+            IPython.display.display = old_display
+
+        @formatting.formatter(IPython.display.HTML)
+        def _format_html(
+            html: IPython.display.HTML,
+        ) -> tuple[KnownMimeType, str]:
+            if html.url is not None:
+                # TODO(akshayka): resize iframe not working
+                data = builder.h.iframe(
+                    src=html.url,
+                    width="100%",
+                    onload="__resizeIframe(this)",
+                    scrolling="auto",
+                    frameborder="0",
+                )
+            else:
+                data = str(html._repr_html_())  # type: ignore
+
+            return ("text/html", data)
+
+        return unpatch
diff --git a/marimo/_plugins/ui/_impl/dataframes/handlers.py b/marimo/_plugins/ui/_impl/dataframes/handlers.py
index 3f3460ed630..ca7ae784049 100644
--- a/marimo/_plugins/ui/_impl/dataframes/handlers.py
+++ b/marimo/_plugins/ui/_impl/dataframes/handlers.py
@@ -182,7 +182,7 @@ def handle_aggregate(
         # Pandas type-checking doesn't like the fact that the values
         # are lists of strings (function names), even though the docs permit
         # such a value
-        return cast("pd.DataFrame", df.agg(dict_of_aggs))  # type: ignore[arg-type]  # noqa: E501
+        return cast("pd.DataFrame", df.agg(dict_of_aggs))  # type: ignore  # noqa: E501
 
     @staticmethod
     def handle_select_columns(
diff --git a/marimo/_smoke_tests/third_party/ipython_display.py b/marimo/_smoke_tests/third_party/ipython_display.py
new file mode 100644
index 00000000000..2ebe4cfe68c
--- /dev/null
+++ b/marimo/_smoke_tests/third_party/ipython_display.py
@@ -0,0 +1,58 @@
+# Copyright 2024 Marimo. All rights reserved.
+import marimo
+
+__generated_with = "0.3.1"
+app = marimo.App()
+
+
+@app.cell
+def __():
+    import IPython
+    import marimo as mo
+
+    url = IPython.display.HTML("https://marimo.io")
+    url
+    return IPython, mo, url
+
+
+@app.cell
+def __(IPython):
+    html = IPython.display.HTML("<em>hello world</em>")
+    html
+    return html,
+
+
+@app.cell
+def __(IPython, html, url):
+    IPython.display.display(html, url)
+    return
+
+
+@app.cell
+def __():
+    # not on PyPI
+    # installation instructions here https://github.com/allefeld/pytikz
+    import tikz
+    return tikz,
+
+
+@app.cell
+def __(tikz):
+    # define coordinates as a list of tuples
+    coords = [(0, 0), (0, 2), (1, 3.25), (2, 2), (2, 0), (0, 2), (2, 2), (0, 0), (2, 0)]
+
+    # create `Picture` object
+    pic = tikz.Picture()
+    # draw a line following the coordinates
+    pic.draw(tikz.line(coords), thick=True, rounded_corners='4pt')
+    return coords, pic
+
+
+@app.cell
+def __(pic):
+    pic.demo(dpi=300)
+    return
+
+
+if __name__ == "__main__":
+    app.run()
diff --git a/pyproject.toml b/pyproject.toml
index 9a40c6608cd..14672b9d7c0 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -113,6 +113,7 @@ testoptional = [
     # have the rust toolchain installed on CI
     "polars==0.19.12",
     "anywidget~=0.9.3",
+    "ipython~=8.12.3",
     "openai~=1.12.0",
 ]
 
@@ -194,6 +195,7 @@ exclude = [
     'marimo/_tutorials/',
     'marimo/_smoke_tests/',
 ]
+warn_unused_ignores=false
 
 # tutorials shouldn't be type-checked (should be excluded), but they
 # get included anyway, maybe due to import following; this is coarse but works
diff --git a/tests/_output/formatters/test_formatters.py b/tests/_output/formatters/test_formatters.py
index 9609563d425..a68487a2cb1 100644
--- a/tests/_output/formatters/test_formatters.py
+++ b/tests/_output/formatters/test_formatters.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 import importlib
 import os.path
 
diff --git a/tests/conftest.py b/tests/conftest.py
index 8f2d4aac9cc..150b7c7d582 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -16,10 +16,7 @@
     ThreadSafeStdout,
     ThreadSafeStream,
 )
-from marimo._runtime.context import (
-    initialize_context,
-    teardown_context,
-)
+from marimo._runtime.context import initialize_context, teardown_context
 from marimo._runtime.requests import AppMetadata, ExecutionRequest
 from marimo._runtime.runtime import Kernel