On the Set: 'How I Met Your Mother'

Over the last six seasons, How I Met Your Mother has continually proved itself to be the most layered, inventive and uproarious comedy on television thanks to a winning combination of Rubik's Cube-like storytelling and an undeniably appealing cast.

Now, as Neil Patrick Harris, Cobie Smulders, Jason Segel, Alyson Hannigan and Josh Radnor head into season seven, the show is also heading into uncharted territory as Lily and Marshall prep for a baby, Ted rededicates himself to love's quest and Barney tackles the possimpible of a real relationship.

In anticipation of tonight's season premiere (get a sneak peek here), ETonline was invited to the HIMYM set to observe the filming of an upcoming episode and find out directly from the cast what fans can look forward to this year! Jason Segel and Alyson Hannigan are up first, so click play to find out what excites them about season seven and how they plan to extend the show's life once the titular Mother is revealed!

How I Met Your Mother premieres Monday, Sept. 19 at 8 p.m. on CBS.