Kaley Cuoco Tearfully Reacts to Being a First-Time Golden Globe Nominee for 'The Flight Attendant'

'The Flight Attendant' did what 12 seasons of 'The Big Bang Theory' couldn't do.

Kaley Cuoco is a first-time Golden Globe nominee.

The actress achieved a career milestone on Wednesday, earning her first-ever Globe nomination for Best Actress in a TV Series, Musical or Comedy for her mind-bending performance as a flight attendant caught in the middle of a twisty, chaotic murder mystery in HBO Max's dark comedic thriller, The Flight Attendant. This marks her first major award nomination for her acting work.

Cuoco will be competing opposite Emily in Paris' Lily Collins, The Great's Elle Fanning, Schitt's Creek's Catherine O'Hara (who won the Emmy last year) and Zoey's Extraordinary Playlist's Jane Levy.

The Flight Attendant also received a series nomination for Best TV Series, Musical or Comedy, adding a second Globe nomination for Cuoco, who serves as an executive producer.

Cuoco posted video of her emotional reaction to landing her first major acting nomination Wednesday morning. In the first of two tearful videos, she is completely speechless after her category is announced, exclaiming "Oh my god" several times in celebration of her achievement. The second video is equally celebratory as she sits in disbelief over the series' nomination.

"Thank you @goldenglobes #hfpa I will never ever forget this moment and I can’t stop crying ... so proud of my entire team @flightattendantonmax ✈️ !!!!!" she captioned the Instagram video.

Shockingly, Cuoco never scored individual recognition at any of the major awards shows, including the Golden Globes, for her 12-season run as Penny on The Big Bang Theory. (Cuoco and her Big Bang Theory castmates did snag six straight ensemble nominations at the Screen Actors Guild Awards, from 2012 to 2017.)

"OMG! My heart is still pounding and the tears won’t stop flowing!" Cuoco said in a statement. "Thank you HFPA for these incredible nominations. This is truly the highlight of my entire career and I couldn’t be more excited and proud to share this recognition with the most incredible cast and crew. This feels like a dream!"

The Globes comes after Cuoco was recently nominated for two Critics' Choice TV Awards for The Flight Attendant, one as an executive producer (Best Comedy Series) and one as an actor (Best Actress in a Comedy Series).

Ahead of the series' premiere, Cuoco opened up to ET about shedding her Big Bang Theory persona to play a woman who is, for all intents and purposes, a hot mess.

"I loved everything about her," she said. "Obviously, this girl struggles and she's got a lot of emotional turmoil, and as we find out in the eight episodes, a lot goes back to her childhood, which is something she's been running from her entire life. And alcohol is what makes her escape from what has truly happened to her. The trauma of waking up [after] this murder, it's just adding on and bringing her back to her childhood."

Adapted from Chris Bohjalian's 2018 novel, The Flight Attendant stars Cuoco as Cassie Bowden, a flight attendant who wakes up after a drunken evening of debauchery and sex with a handsome stranger (Michiel Huisman), only to find him gruesomely murdered. Without any recollection of what happened or if she had anything do with his death, Cassie goes down a dangerous spiral as her past demons resurface amid her search for the truth.

"I got to play so many different emotions that I've never been able to do before. I've never had the opportunity, so this was my time," Cuoco told ET. "In the last few episodes, she really hits rock bottom and I think I went into the hair and makeup room maybe twice 'cause we just kind of let everything go. And it was so cool 'cause it felt so real and authentic. I'm like, shouldn't look her best. This is not [that], you know what I mean? So it was kind of cool to get authentic and real and play it as real as I possibly could."

The Flight Attendant was recently renewed for a second season, and ET spoke with creator Steve Yockey about wrapping up season 1's mystery and what's in store for Cassie next. For more on The Flight Attendant, watch below.

The 2021 Golden Globes, hosted by Tina Fey and Amy Poehler, will air live on Sunday, Feb. 28 at 5 p.m. PT/8 p.m. ET on NBC. Until then, stay tuned to ETonline.com for complete Golden Globes coverage.