The "Big Little Lies" star was on her way to get ready for the Oscars when she bestowed the surprise greeting.
While Bullock was mid-chat (discussing her forthcoming film Ocean's Eight) with Vanity Fair's Krista Smith during ABC's red carpet pre-show, Kidman snuck around back and made her way up to surprise Bullock.
The Oscar winning actress kicked off the metallic trend on the red carpet, with Sandra Bullock (in Louis Vuitton), Lupita Nyong'o (in Versace) and Gal Gadot (in Givenchy), all following suit in shimmering metallics - no doubt referencing the infamous golden statuette - with Twitter in overdrive calling Lupita an actual IRL Oscar, which tbf, is pretty accurate.
The 50-year-old yelled out the window, "Hi everyone, she said to the bus full of excited fans". Raised by their aunts after their parents' death, the sisters grew up in a household that was anything but typical - their aunts fed them chocolate cake for breakfast and taught them practical magic.
Twenty years later, the pair engaged in a humorous moment together on the red carpet, as Kidman crashed Bullock's interview with a reporter, telling her to "topple over". "Nicole Kidman always butts into my stuff!" "This is a woman I love!"
Once they realized who was waving at them, the fans quickly whipped out their cell phones to take a quick snap of the Australian actress, and Nicole was in good spirits about it all. And what resulted was practically magic: a nostalgic Practical Magic reunion almost 20 years after the campy film's debut to be exact.
'And we're really good drinkers too, ' Sandra quipped.