by Ellen DurneyBuzzFeedBuzzFeed StaffHi, I'm Ellen! If you can believe it, it's been almost exactly 12 years since the finale of How I Met Your Mother aired - and the show's core cast members are spilling all the behind-the-scenes tea. Cbs Photo Archive / Getty Images For context, Josh Radnor, who starred on the show as Ted Mosby, has a rewatch podcast called How We Made Your Mother, which he hosts alongside the series co-creator Craig Thomas. This week, the duo was joined by none other than Neil Patrick Harris, who, of course, starred alongside Josh as the iconic Barney Stinson.