Carrie Underwood shares a cute picture of the father-son duo

The American Idol star Carrie Underwood took to Instagram to share a cute nap picture of her hockey star husband Mike Fisher and son Isaiah.

The father-son duo accompanied the Fisher, 32, to her rehearsals, reported US Magazine.

"Isaiah's first band rehearsal...As you can see he & his daddy were totally into it! #naptime #earmuffs #sweetdreams," she captioned the image of her infant son sleeping in the arms of his father, 35, who was also taking a nap.

Fisher and Underwood welcomed their little bundle of joy in February.