Katherine Heigl's Daughters Help Dad Josh Kelley Write a Song on the Piano -- Watch!

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Katherine Heigl's daughters are getting into the songwriting spirit!
The Doubt star shared a video of her kids, Nancy and Kelly, helping out their singer-songwriter dad, Josh Kelley, as he worked out a tune on the piano.
"Daddy/daughter work session," the 38-year-old actress wrote on Instagram. "How @joshbkelley comes up with new material! I think they're on to something! #daddysgirls #thoseheavenlydays #badlandsranch."
Watch the sweet video below.

Heigl and Kelley married in 2007, and are expecting baby No. 3 come June, which should make for even more helping hands on the piano keys.