Legends supporting legends.

One month after Beyoncé supported Taylor Swift at the Los Angeles premiere of her “Eras Tour” movie, Swift returned the favor by showing up at the London opening of Queen Bey’s “Renaissance” film Thursday — and dressing on theme.

The “Cruel Summer” chart-topper walked the event’s red carpet wearing a high-slit silver Balmain gown covered in sparkling sequins.

Simple black Giuseppe Zanotti slingbacks, Anita Ko jewels, Old Hollywood-style waves and Swift’s signature red lip finished off the look.

Ever since Beyoncé’s August request that fans attend her shows wearing their “most fabulous silver fashions,” the metallic hue’s become the unofficial color of the “Renaissance” tour.

At Swift’s “Eras Tour” event at The Grove on Oct. 11, the “Blank Space” singer channeled Cinderella in a blue strapless Oscar de la Renta gown and faux bob, while the “Break My Soul” songstress went futuristic in a chrome-accented LaQuan Smith catsuit.

Post-premiere, Swift shared a sweet Instagram clip of the duo sharing a tub of popcorn in the theater, along with a heartfelt caption.

“I’m so glad I’ll never know what my life would’ve been like without @beyonce‘s influence,” she began.

Beyoncé Knowles-Carter and Taylor Swift attend the "Taylor Swift: The Eras Tour" Concert Movie World Premiere at AMC The Grove

Taylor Swift performing

“The way she’s taught me and every artist out here to break rules and defy industry norms. Her generosity of spirit. Her resilience and versatility. She’s been a guiding light throughout my career and the fact that she showed up tonight was like an actual fairytale.”

While Swift skipped the LA “Renaissance” premiere on Saturday, as she was playing an Eras Tour show in São Paulo that night, she clearly couldn’t miss the opportunity to hype up her fellow pop hitmaker across the pond.

“Renaissance: A Film by Beyoncé” hits theaters Nov. 30, while “Taylor Swift: The Eras Tour” is still screening in cinemas and will also be available to rent on demand starting Dec. 13 — which happens to be Swift’s birthday.