The ultimate girls night out.
The blonde beauties, who have been friends for nearly a decade, posed together on a blue velvet couch inside the venue, with Swift leaning into Lively’s lap.
Meanwhile, the “Gossip Girl” alum reached around Swift, placing her hand on the 12-time Grammy winner’s thigh.
Lively, 36, rested her other arm on the “All Too Well” singer’s shoulder as Swift tilted back to return the gesture.
The mother of four showed a little skin in a chic Chanel set, which was slightly unbuttoned and featured a jagged hemline of silver sequins.
Both women gave the camera their best smize as they took in the star-studded event.
The “Cruel Summer” singer, who stunned in a high-slit silver Balmain gown, also posted a photo with the woman of the hour.
The 33-year-old and Beyoncé, 42, posed for a photo together on the red carpet, with each superstar wrapping one arm around the other’s waist.
“Got invited to London by The Queen…✨ 👑 ✨ Renaissance: A Film by Beyoncé is in theaters now!!” Swift captioned the images.
While Swift stuck to the silver theme of the “Formation” singer’s tour, Beyoncé opted for a bedazzled, black blazer dress.
The 32-time Grammy winner kept her new platinum blonde tresses tied back and accessorized with massive diamond earrings.
The sheer amount of female “power” in the photos sent the internet into a frenzy.
“THE MOTHERS HAVE MOTHERED AT MAXIMUM MOTHERISM,” one fan wrote.
“I’m dying these are ALL GORGEOUS QUEENS,” a second person said.
“Women supporting women, we love to see it ,” a third excited user chimed in.
Meanwhile, another joked that they are “going to need 7-9 business days” to recover.
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Despite the fun-filled evening, Swift left London just a few hours after the event to head back home to see boyfriend Travis Kelce — yet it’s unclear if Lively also got a lift from Swift back to the states.
The “Midnights” singer’s plane was spotted touching down in Kansas City on Friday morning and she reportedly plans to spend a lot of time with the NFL star now that she has a break from touring.
Aside from an apparent trip to visit Patrick and Brittany Mahomes, the pair have seemingly been lying low at Kelce’s $6 million mansion, which he allegedly bought specifically to give the pair more privacy.