14. In Real Life The Ages Are All Over The Place
With flashbacks showing the main cast at varying stages in life, ranging from the late-nineties all the way to 2030, it's clear the actors can pull off younger and older ages with ease. Although that should be obvious given that in the real world the actual ages of the cast are all over the place; Neil Patrick Harris is nine years older than on-screen wife Cobie Smulders, while Jason Segel is six years younger than Josh Radnor and Alyson Hannigan, who he's meant to have gone to college with. Funniest of all, Cristin Millioti, who plays Tracy Mosby (née McConnell), is only eighteen months older than Lyndsy Fonseca, her in show daughter (most articles on her tend to divulge in pervy vulgarity, but let's try and avoid that).
Even with the future setting seeing Radnor as Ted, it's still a very strange thing to consider; it's all thanks to the show running longer than expected and the casting of someone who is over ten years Radnor's junior as the mother.