Can you use iPhoto slideshows in iMovie?

Yes, you can use iPhoto slideshows in iMovie by exporting the slideshow as a video file from iPhoto and then importing that video into iMovie. Simply create your slideshow in iPhoto, export it to your desired format, and then open iMovie to add the exported slideshow to your project. This allows you to incorporate your iPhoto slideshows into your iMovie edits seamlessly.