The ‘Big Bang Theory’ actress and her partner Tom Pelphrey welcomed baby Matilda in March.

On Tuesday, the Big Bang Theory star, 37, shared a sweet snap on Instagram of Matilda grinning for the camera in a white onesie and matching bib.

Matilda may only be five months old, but the adorable youngster is certainly just as smiley as her mom.

Another black-and-white shot shared by the actress showed Cuoco herself grinning for a selfie while holding Matilda in a baby carrier.

Last month, the actress shared an adorable video of Matilda wearing her first pair of shoes — and sweetly noted her daughter’s curiosity about the footwear.