Stone, sitting near Colman in the Dolby Theatre, also broke into tears as the award was announced and could be seen repeating "oh my God" over and over again.
The 45-year-old actress starred in The Favourite and gave a fan favorite performance in the period-piece comedy.
She beat out Glenn Close, who was considered the front-runner going into Sunday's Oscars. With this year's much-lauded and highly personal project "Roma", he picked up another directing award and the cinematography prize, but "Roma" also won the foreign language award, a first for Mexico.
The last time a Brit won the accolade was in 2009, when Kate Winslet won for her portrayal of Hanna Schmitz in The Reader.
Asked what Queen Anne would say after her win, Colman replied, "Eat some cake".
But the award was snatched by Bafta victor Colman, who told her from the stage: "You have been my idol for so long, this is not how I wanted it to be".
Screenshots of Close's face after the announcement suggest the actress was just as surprised as Colman.
"I could not tell you what I'm feeling", she said backstage. And yes, Colman did make a farty noise with her mouth. She called out her husband for crying.
Glenn Close’s Dog Pip Was the MVP at the Independent Spirit Awards
Despite the celebrity names, all eyes are on the best picture prize in one of the most eclectic Oscar line-ups for years. The ceremony is scheduled to begin at midday on Monday AEDT inside a star-studded Dolby Theatre.
"It's not about how many times you are rejected and how many times you fall down, it's how many times you stand up and keep going".
"Any little girl who's practicing their speech on the telly - you never know!" In the end, Sinclair ended up becoming a writer while Colman pursued acting.
It has been 33 years since She's Gotta Have It shook the world of independent cinema and introduced a brand new voice, a young and daring filmmaker in Lee. Industry insiders thought that she was a shoo-in to win, even though A Star Is Born fans wanted Lady Gaga to pick up the Oscar.
"My mum and my dad and my kids who are at home watching, well if you're not then well done, but I sort of hope you are".
Throughout the 2019 awards season, the actress has steadily proved her prowess as a low-key fashion icon who is willing to take a risk or two. And in contrast to first-time nominees, Carter's speech reflected her decades of experience and lack of recognition from the Academy. Thank you. Argh, thank you so much.
Especially Aparicio, who earned an Oscar nomination for her feature film debut in Roma.
"Marvel may have created the first black superhero, but through costume design we turned him into an African king", Carter added.
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