Who says blondes have more fun?

Sydney Sweeney went incognito for a day at the Santa Monica Pier, hiding her signature flaxen hair under a dark brown wig with bangs.

The 29-year-old “Euphoria” star credited her friend Jayde Emory Hafner with the disguise, captioning a series of snaps from their outing, “when ur bestie shows up and says ‘here put this wig on’ 😂🥰.”

The pals hit the arcade, posed for selfies on the rides and refueled with chicken tenders and fries before soaking up some sun.

Sweeney dressed the part of a day-tripper in a Santa Monica souvenir T-shirt, denim shorts and white sneakers. Still, her A-list accessories — huge diamond studs, Bottega Veneta sunglasses ($615) and The Row bag — may have given her away.

In a video from the day, the actress tackled the “Hang Time” challenge, dangling from a pull-up bar for a full minute.

Fans got a kick out of the look.

“That you Hannah Montana?” one commenter asked, while another wrote, “I didn’t even recognize her.”

Hafner’s husband joked, “A couple of small town sisters on their big California vacation 🎡😆”

This isn’t Sweeney’s first brush with darker hair. She wore a brown mullet wig on the “Christy” set and donned a black bob for the 2024 Met Gala.

Her most dramatic real-life switch-up came last October, when she cut her long blond hair into a chic chin-length look.

The long, wavy look has since made a comeback, and judging by her caption, the brunette bangs were strictly a rental.