The TV actress partied with her Big Bang Theory co-stars as they marked the 200th episode of the show - and Kaley wore her 'dream dress' for the occasion.
And, yep, we LOVE it.
Kaley, 30, walked the red carpet at the Big Bang Theory 200th episode party held at LA's Vibiana in a stunning black dress designed by Marchesa Fashion.
We have a serious girl crush!
Taking to her official Instagram page before the big event, the Golden Globe winner told her 2.1million followers how "excited" and "grateful" she was.
She wrote: "I finally got to have my first @marchesafashion moment tonight and I have never been more excited!!! Thank you @mrbradgoreski @daniela_viviana for putting me in my dream dress- @jamiemakeupgreenberg for the perfect conservative smokey eye @clsymonds for letting me copy the hair you came in with tonight @mobelisa for the perfect nude mani/pedi and @bigbangtheory_cbs for letting me be part of such a special evening . I'm feeling really lucky and extremely grateful."
She added: "200 episodes in the books! Thank you to all that made this dream a reality."
Kaley's co-stars Jim Parsons, who plays super-nerd Sheldon Cooper in the hit CBS series, was also at the starry event.
Johnny Galecki, aka Leonard Hofstadter, was present too (although we think Kaley may have stolen the limelight just a bit!).
The Big Bang Theory premiered on CBS in September 2007 with the current series being the ninth.
The cast enjoyed their party on the same day that The City of Pasadena in California declared this coming Thursday (25 February) The Big Bang Theory Day.
The 200th episode of the show will air on CBS in the US on Thursday at 8pm.
Sara Gilbert will be returning for the special episode, while Batman star Adam West will make his first cameo appearance.
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