Joan Rivers has made a career of insulting famous people, but while some celebs are able to laugh off Rivers' legendary jabs, others are unable to forgive and forget.
Kim Kardashian is apparently in the latter category.
According to Us Weekly, Kim and Joan were seated near one another at the NBC Upfronts on Thursday, but Kardashian had Rivers moved away from her by staff.
Of course, Kim has good reason to be upset, considering it wasn't all that long ago that Rivers called North West ugly.
We think it's safe to say most moms wouldn't want to sit next to anyone who dissed their baby's appearance on national TV.