Exclusive Raising Hope Video: Baby Hope is Walking and Running! What's Next?

When Raising Hope returns for Season 2, fans will notice one big difference: baby Hope is on the move!

"What will we do now that baby Hope is running? I don't know," star Lucas Neff says in this exclusive behind-the-scenes video. "She's beyond walking, that's for sure. She's jumping."

Fall Preview: Get scoop on your favorite returning shows

Even if baby Hope's increased mobility make things in the Chance household a little more chaotic, off-screen, Neff is enjoying teaching the twins who play his daughter — Bayley and Rylie Crecut — some new moves. "I'm teaching them a little bit of self defense on some pillows, which is really, probably a bad idea," Neff says with a laugh.

The other, less obvious, adjustment for Season 2 is the promotion of Cloris Leachman from recurring guest star to full-fledged series regular.  "I never know what to expect," she says. "I'll ask Greg Garcia, our creator, what am I going to do next week and he'll say, 'I don't know. We haven't written it yet.'"

Hear more from the cast of Raising Hope here:

The new season of Raising Hope premieres on Tuesday, Sept. 20 at 9:30/8:30c on Fox.