If You're Not in the Obit, Eat Breakfast follows Carl Reiner as he poses the question, "'What's the secret to living into your 90s – and loving every minute of it?' Reiner tracks down several celebrated nonagenarians, and a few others over 100, to show how the twilight years can truly be the happiest and most rewarding. In addition to Reiner, the film stars Mel Brooks, Dick Van Dyke, Norman Lear, Kirk Douglas, Betty White, Tony Bennett and Jerry Seinfeld — who’s already reserved the stage at Caesar’s Palace for his 100th birthday show. Longevity expert Dan Buettner is also in the film.