Jim Parsons Spoils Kaley Cuoco's Birthday Surprise In Sitcom-Like Flub

Jim Parsons may be a wonderful co-star for Kaley Cuoco on "The Big Bang

Jim Parsons may be a wonderful co-star for Kaley Cuoco on “The Big Bang Theory,” but he’s a lousy secret-keeper.

On Thursday, the sitcom actor shared a photo on Instagram of a surprise birthday cake for Cuoco. Only he mistakenly tagged her on the post, alerting her to the celebration afoot. Dude.

Parsons tried to recover with a quick “oops,” but it’s Cuoco’s deadpan reaction to the cake post that tells it all.

Cuoco, whose actual 33rd birthday fell on Friday, was definitely laughing on the inside. “ON THE FLOOR,” she commented in the post, per “Entertainment Tonight.”

We could totally see Parsons’ self-absorbed Sheldon character accidentally ruining a surprise birthday celebration for Cuoco’s Penny (heck, maybe it even happened in those 250-plus episodes). But in real life, it might even be funnier.

Related Coverage

Kaley Cuoco Tries To Sing 'The Big Bang Theory' Theme Song On 'The Tonight Show'

Jim Parsons Credits Britney Spears For His Success On 'Tonight Show'

Kaley Cuoco Undergoes Shoulder Surgery For Her 'Honeymoon'

Love HuffPost? Become a founding member of HuffPost Plus today.

This article originally appeared on HuffPost.