Kelly Clarkson Shares New Pic of Baby Boy for Father's Day, Thanks Husband Brandon Blackstock for 'Being Such

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Kelly Clarkson showed off her happy family -- including her 2-month-old baby boy, Remington -- in a heartwarming snapshot she shared in celebration of Father's Day.

Clarkson took to Twitter on Sunday to post the adorable photo of her husband, Brandon Blackstock, holding Remington and their 2-year-old daughter, River, in his arms.

"Happy Father's Day @BBlackstock," the 34-year-old "Piece by Piece" singer captioned the cute pic. "Thnx 4 being such a great dad 2 all 4 of our kiddos! #sexydaddyalert."

WATCH: Celebs Share Social Media Love on Father's Day

Blackstock also has two children, daughter Savanna and son Seth, from a previous marriage.

Clarkson has only shared a handful of photos of her newborn son since welcoming him in April, including this adorable black-and-white snapshot introducing Remington to the world when he was a week old.

WATCH: Kelly Clarkson's Children Pose Together for Cute Family Photo

Country legend Reba McEntire, ex-wife of Blackstock's father, Narvel Blackstock, spoke with ET back in May and marveled over meeting Remington when he was a day old, exclaiming, "We're buddies already!" Check out the video below to hear more from McEntire about meeting Clarkson's new bundle of joy.