Have you ever heard of the friendship algorithm?

I would say we’re friends."

Depending on how you perceive it, Bialik’s smile conveyed the message: “It’s complicated.”

Kaley Cuoco (L) and Mayim Bialik (R) attending the 2018 Critics' Choice Awards

Based on what we’ve compiled about their friendship, it certainly is just that.

Cuoco supposedly thought Bialik was throwing shade at her hefty paycheck.

Around Season 10 of the series, Cuoco was reportedly feeling stagnant in her role as Penny.

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The insider said Cuoco “[flipped] out about makeup, wardrobe, even the catering.”

Her diva behavior was reportedly so bad that Bialik would make an effort to avoid Cuoco on set.

Mayim Bialik was the first to confess her love for Cuoco, tellingE!

Kaley Cuoco and Mayim Bialik at the premiere of “The Bronze”

The closeness might be true for Cuoco, too.

The star even posted a shoutout onInstagramfor Cuoco, writing, “What a wedding!

As of this writing, Bialik is still not a part of Cuoco’s “following” list.

Kaley Cuoco and Mayim Bialik looking in different directions at the 2014 People’s Choice Awards

“Very bizarre take and also perception of social media.

I have an instagram where I have friends and old classmates etc.

Bialik has added fuel to the fire, though.

Mayim Bialik’s Instagram post for Kaley Cuoco, 2016

“I thought you and Penny were besties,” anotherwrote.

Happy happy birthday Kaley Cuoco @normancook[.]

We love you!!”

Kaley Cuoco at The John Ritter Foundation for Aortic Health’s 2024 “An Evening From the Heart LA”

The photo appeared to be taken while Bialik was having brunch with Cuoco and her sister.

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in the comment section of Cuoco’s since-deleted post commemorating the show’s ending (viaMetro).