Olivia Attwood’s Halloween Costume 2026: Sexy Harley Quinn With Pete Wicks as the Joker

By Nico Grey · Published Nov 1, 2026, 11:11 PM (BKK)

I’ve been behind the camera since 2001 and shot more than 2,000 scenes, and here’s what nobody tells you about couple chemistry: you can’t fake it, you can only light it. Olivia Attwood and Pete Wicks didn’t need lighting. For Halloween 2026 she poured herself into a metallic minidress as Harley Quinn, he dyed his hair green to be her Joker, and they walked into her own party like the most dangerous couple in London.

Olivia Attwood’s Halloween costume in 2026 was Harley Quinn, Margot Robbie’s version from Suicide Squad, with boyfriend Pete Wicks as Jared Leto’s Joker. The Daily Mail says the couple “pulled out all the stops” when they arrived at her Halloween bash on Thursday, Oct. 29: Olivia, 35, in a metallic minidress with her skin covered in tattoos, Pete, 37 at the time, with his “signature long locks” dyed green and white paint on his face and body.

It wasn’t just any party. It was hers. Olivia hosted “Olivia’s Haunted House” at Stereo Bar in Covent Garden, with an exclusive DJ set from JLS star Marvin Humes, per the Daily Mail and The Mirror. Marvin and Rochelle Humes showed up as Nelly and Kelly Rowland from “Dilemma”, and Love Island’s Samantha Kenny arrived in a white bridal lingerie look with lace stockings, per The Sun.

The photos: Olivia Attwood as Harley Quinn and Pete Wicks as the Joker

Embedded from X, not re-hosted. The Daily Mail Celebrity post links its story with the arrival photos; the Love Island Crave post (290K+ views) shares the couple’s photos. The Sun credits its arrival pictures to Splash and the pre-party video to Olivia’s Instagram (@olivia_attwood).

Olivia’s Harley Quinn costume, piece by piece

• The dress: a slinky, plunging metallic chainmail minidress (The Sun) worn braless, with the legs out. Not the hot pants and baseball tee from the film, which makes it sexier, not less accurate.
• The hair: a platinum blonde wig with the ends dyed red and blue, Harley’s trademark two-tone tips.
• The tattoos: fake inkings all over her arms and legs, the scribbled Harley look from the movie.
• Pete’s Joker: black trousers and a white shirt, hair actually dyed green, face painted white and a fake “damaged” tattoo on his forehead, per the Manchester Evening News. That forehead tattoo is pure Jared Leto.

Dress, wig and tattoos per The Sun and the Daily Mail; Pete’s look per The Sun, the Daily Mail and the Manchester Evening News. The rest is what the published photos show.

The dress that didn’t quite behave

A chainmail mini with nothing under it was always going to be a risk. The Sun reports that in a video Olivia shared on her own Instagram before heading to the party, the dress slipped and gave her followers a lot more Harley than planned, and that at the party she was photographed clutching the front of the dress to keep it in place. Very on-character: Harley has never done anything halfway.

Then the night went full Olivia. Per the Daily Mail, she tucked into McDonald’s chicken nuggets before hitting the dancefloor with her celebrity friends. Fans loved the couple’s video, and her co-star Nicole Bass wrote that they had “nailed it,” per Digital Spy.

Nico’s take: the Joker dyed his hair, which tells you everything

Olivia and Pete: how we got here

Olivia Attwood, 35, born May 2, 1991, found fame on Love Island in 2017 and went on to front her own ITV documentaries and a seat on the Loose Women panel. Pete Wicks made his name on The Only Way Is Essex and later danced on Strictly Come Dancing. According to The Sun, the two have been dating since early this year, after Olivia split from her husband and partner of a decade, footballer Bradley Dack, and she recently sparked engagement rumours by sharing a note reading “Mrs Olivia Wicks.”

On her return to Loose Women, Olivia explained how it happened, per the Daily Mail: “I think that me and Pete were friends for years… We have the same sense of humour. We got on really well, and I think him more than any of the partners I’ve had before.” And the line that sums him up: “I think I’ve softened him a little bit.”

Harley wasn’t her only look this season. A day before the party, on Oct. 28, she posted herself as Regina George from Mean Girls in a replica of the “a little bit dramatic” T-shirt, and fans called it “iconic” and “so fetch,” per the Daily Mail. After the party the couple flew to Las Vegas, where on Oct. 31 they posted a hotel mirror selfie with a “Welcome Sin City” sticker, Olivia in just her underwear and her head on Pete’s shoulder, per the Manchester Evening News. Pete turns 38 on Nov. 1.

Harley Quinn, Margot Robbie and the costume that never dies

Harley Quinn first appeared in Batman: The Animated Series in 1992 as the Joker’s psychiatrist turned partner in crime. Margot Robbie’s take in Suicide Squad (2016), opposite Jared Leto’s tattooed, green-haired Joker, turned her into one of the most copied Halloween costumes of the decade. For Margot’s full on-screen career, from The Wolf of Wall Street to Harley and beyond, see our Margot Robbie page. Another DC bad girl had a big year too: Valentina Sampaio went Poison Ivy at Heidi Klum’s party.

Timeline

• 1992 (throwback): Harley Quinn debuts in Batman: The Animated Series.
• 2016 (throwback): Margot Robbie and Jared Leto play Harley and the Joker in Suicide Squad.
• Early 2026: Olivia and Pete start dating, per The Sun.
• Oct. 28, 2026: Olivia posts her Regina George look, per the Daily Mail.
• Oct. 29, 2026: Harley and the Joker arrive at “Olivia’s Haunted House,” Stereo Bar, Covent Garden, per the Daily Mail.
• Oct. 30, 2026: The Sun reports the dress slip in her pre-party Instagram video; Digital Spy and The Mirror run the costume.
• Oct. 31, 2026: The couple post from Las Vegas, per the Manchester Evening News.
• Nov. 1, 2026: Pete turns 38; Olivia lands at No. 31 on our Top 100.

More celebrity couples this Halloween

Couples went hard this year. Kourtney Kardashian and Travis Barker did Scarface, Elvira and Tony Montana, Vittoria Ceretti went Red Riding Hood with Leonardo DiCaprio as the wolf, and Stacey Solomon and Joe Swash got in the Pretty Woman bath. On the British side, Helen Flanagan turned up as Wuthering Heights‘ Cathy in a lace corset, and Perrie Edwards brought back her “Touch” corset.

FAQ

What was Olivia Attwood for Halloween 2026?

Harley Quinn, Margot Robbie’s version from Suicide Squad, in a metallic chainmail minidress, a platinum wig with red and blue tips and fake tattoos. Her boyfriend Pete Wicks went as the Joker.

Where did Olivia Attwood and Pete Wicks wear their Harley Quinn and Joker costumes?

At Olivia’s own Halloween party, Olivia’s Haunted House, at Stereo Bar in Covent Garden, London, on Thursday, Oct. 29, 2026, with a DJ set from Marvin Humes, according to the Daily Mail.

Did Pete Wicks really dye his hair green?

Yes. The Daily Mail and The Sun both report that Pete dyed his long hair green for the Joker and painted his face white.

Are Olivia Attwood and Pete Wicks dating?

Yes. They have been together since early 2026, according to The Sun, after Olivia’s split from Bradley Dack. She has sparked engagement rumours, but no engagement has been announced.

What other Halloween costume did Olivia Attwood wear in 2026?

Regina George from Mean Girls, in a replica ‘a little bit dramatic’ T-shirt, posted on Instagram on Oct. 28, 2026.

— Nico. A chainmail mini, green hair, a party she threw herself and a dress that slipped on camera. Olivia didn’t just wear Harley, she cast her boyfriend as the Joker. The rest of the year’s hottest looks are in the Top 20.

Fact-check: Scandal Planet Desk

Photos: embedded via X posts, not re-hosted. ScandalPlanet watermark only.

Follow us on X for new celebrity scenes