Kaley Cuoco ’s trip around the sun was a big bang.

Indeed, the Big Bang Theory alum shared a look into her 40th birthday celebration with her loved ones, including fiancé Tom Pelphrey .

“This is 40. What a year, what a decade, what a life!” Kaley wrote on her Dec. 2 Instagram post , which sees her drinking martinis with her friends. “I had an amazing west coast surprise party that took my breath away, and last night, the sweetest most fun east coast bday dinner (at my favorite NY restaurant) with some of my nearest and dearest.”

For the special occasion, the Flight Attendant actor—who shares daughter Matilda , 2, with Tom—wore a black silk jumpsuit, her brown hair slicked back into a low ponytail. Her fiancé also matched her vibe, sporting an all

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