Rosie O'Donnell is set to guest-host Jimmy Kimmel's show, reportedly as a "special treat" for Donald Trump, amid a long-standing feud. The exact timing of her guest-hosting stint is unclear, but it is expected to occur during Kimmel's hiatus, possibly in August. Details about the arrangement and what to expect from O'Donnell's episodes are emerging, with some outlets suggesting she has a specific assignment related to Trump.