The truth came out on How I Met Your Mother Season 9 Episode 15.
In the most entertaining of ways and across a number of storylines, as well.
We flashed to the future, for example, and saw Ted rush to the hospital with a very pregnant Mother. They were on their way to welcome little Luke into the world, with daughter Penny by their side.
Yup. It's the kids' names, people!
Viewers also discovered just what Barney does for a living, but not before an amazing montage that recounted his levels of inebriation. Oh, yes, it was legendary.
Catch up on all the fun when you watch How I Met Your Mother online now: