The friendship between Amy and Penny ofThe Big Bang Theoryis a fulfilling one . Much like Penny and Leonard ’s kinship , Amy and Penny correspondence each other out . Their differences are what work them together as they get a line new things about the world . Amy finally gets the social circle she always desire when she was a unseasoned female child and Penny at last has a supporter who is secular and teaches her thing besides how to use a credit card . While Amy ’s compulsion with Penny was have intercourse too soon on , Penny did n’t admit Amy was her best friend until Amy and Sheldon started design their wedding party . And although the two are airless as can be by the twelfth season , Amy showed many signs of jealousy with cent . Keep scrolling to see 10 green - eyed fiend moments .

PENNY IS VERY CLOSE TO SHELDON

Penny has known Sheldon since season one whereas Amy did n’t meet him until the third time of year . And even when Amy got to know Sheldon , they did n’t become close until time of year five when Sheldon finally call for her to be his official girlfriend .

This means that Sheldon and Amy had a draw of time to get to know each other on a deeply personal level . Unlike Leonard , Penny was able to listen to Sheldon and give him similar advice his mother would give him ( minus the biblical talk ) . Their trust within one another and Sheldon ’s power to open up to Penny makes Amy green-eyed . She even give tongue to this to Leonard in " The Anything Can Happen Recurrence . "

AND SEEMS TO BE CLOSER TO SHELDON’S MOM THAN AMY IS

We first met Mary Cooper in the first time of year , meaning she already knew Penny for at least three to four years before she ever encounter Amy . AsSheldon ’s mother , one would assume she was also a brainiac with a deficiency of societal awareness but she ’s the staring opposite . Though she give her life to God and the church , she is extremely humbling and relatable , which draws Penny to her . Mary Cooper is sort of like a mother - figure to Penny since she see Mary more than her own mother . This , of course , can make Amy feel awkward . Not only does Penny have the power to make Sheldon feel comfortable but she also has the social works to draw in Mary Cooper in — an power Amy is n’t all that familiar with .

SHE’S CONSTANTLY PRAISING PENNY’S GOOD LOOKS

Amy never got to pay heed out with the pop crowd in high school so this was her second chance at popularity . Some even thought Amy had a compaction on Penny , specially after she kissed her at a Browning automatic rifle and started singing " I snog a Girl . " However , her obsession with Penny ’s looks seems to descend from curiosity and wonder , not romantic feelings .

AMY IS FASCINATED BY PENNY’S ABILITY TO LIE SO WELL

When Bernadette let pregnant for the first time , she asks everyone not to say anything . Bernadette ’s chore is very authoritative to her and the last thing she wants is for her co - workers to start dismissing her because she ’s a before long - to - be female parent . But when Penny circumstantially tells a co - worker , Bernadette becomes angry .

At first , Penny lied to Bernie and claim she never told anyone but the truth came out when it was just Amy and Penny left in her flat . Amy was more aghast at cent ’s ability to severalize a lie than the fact that she actually have out a big closed book . Her jealousy and fascination over Penny ’s societal abilities encourages her to do a study on Penny ’s mental capacity one day .

SHE WANTED TO BE APART OF GIRLS NIGHT

The Amy we met in time of year three is very different than the Penny we meet in season five through 12 . In season three , she was very robotic and wry . She study thing very seriously and only seemed interested in straight - to - the - full point conversations . Nevertheless , when Amy realized that two women in their group were hanging out for girls Nox , she want to know what that entailed . Amy had never had a daughter Nox before and was overjealous woman she knew were having one . So what did she do ? She invited herself .

AMY’S JEALOUS OF PENNY AND LEONARD’S PHYSICAL RELATIONSHIP

Three geezerhood after becoming a couple , Amy and Sheldon said " I sleep together you " for the first prison term . But after five days of dating and no advancement in their relationship , Amy called it throw in the towel . As we know , that breakup did n’t last long and the two at last got together and slept together by time of year nine but it took one too many years to get to a easy point in their relationship .

Meanwhile , Penny and Leonard were kissing , snuggling , and log Z’s together on and off in their family relationship for years . Sure , Amy and Sheldon were lightyears ahead of Penny and Leonard emotionally but physically , Leonard and Penny had the relationship Amy always need with Sheldon .

PENNY WENT TO SEVEN PROMS

In the eighth season , the crew threw their own prom since none of them ( except for cent ) had great prom experiences . As the girls were blab out about their prom memories , Amy was shocked Penny went to seven promenade . Or as Penny say " four ' under the seas , ' two ' enchanted evenings , ' and one Nox to remember - that I can not remember for the life story of me . " Considering Amy ’s prom day of the month was a mom from the janitor ’s wardrobe , Penny had the prom experience Amy literally solar day - dreamed about .

BERNADETTE CHOSE PENNY TO BE HER MAID OF HONOR

It was jolly comical to see how much Amy require to be maid - of - honor in Bernadette and Howard ’s wedding . No one experience she would give care so much but considering this is the closest Amy has ever been to a mathematical group of girls , she wanted to overdo the closeness . However , when Bernadette was go to opt centime as hermaid - of - honorinstead , Amy fell into a dark depression . How come Penny always came out on top ? This also made her overthink her kinship with Bernadette and enquire if they were as close as she think they were . By the final stage of the episode , Bernadette realized that Amy really should get the maid - of - honor title and Penny was felicitous to pass it along .

MEN ONLY SEND DRINKS TO THEM IF PENNY IS THERE

In " The Hofstadter Insufficiency , " Bernadette and Amy go away for a biota conference . The two end up have an amazing fourth dimension peach about scientific discipline — something they ca n’t do too much of with Penny around .

While the two were out have a potable , two man get off them drinks to say hi and totally made their night . This was one of the first time humans were sending them drinks because they were concerned in them , not cent . Amy made Bernadette realize that for once , they were the centre of the aid — not their other beautiful best friend . This , of path , could fall with a hint of jealousy .

RAJ NEVER HAD A CRUSH ON AMY

In another epic fille night , Raj decide to link them after he loses game nighttime with the hombre . With Penny , Bernadette , Amy , and Raj all huddled around a cocktail bar , Raj admit he always has crushes on the women his booster ' day of the month . Amy is directly blandish that Raj used to like her but Raj deny it . He ’s blind to how rude he ’s being and read he never once thought of Amy in a amorous mode — just Bernie and Penny . As one can imagine , Amy was down in the dumpsite until they all mouth it out .

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amy and penny feature image - tbbt

8- Sheldon Penny

Mary Cooper looks through penny’s laundry on the Big Bang theory

PENNY AND AMY FROM THE BIG BANG THEORY

PENNY BLABS ABOUT BERNIES PREGNANCY

AMY invites herself to girls night - big bang theory

Penny and Leonard lie in bed and talk on TBBT

Sheldon tells Amy he loves her on The Big Bang Theory

bernadette’s wedding

Bernadette and Amy drinking cocktails out of large glasses in a bar in TBBT

raj and amy - tbbt