Megan sported a black dress with a unique twist.

The star’s neckline plunged incredibly low, leaving most of her cleavage on show.

The entirety of her torso and arms, apart from two black bands on her biceps, were covered by sheer fabric, revealing her toned abs.

The skirt of the dress was in black silk, falling down to the ground with only a peep of her platform heels coming out from underneath.

Megan had a long red manicure, teamed with super-long lashes and a peachy pink lip.

Most shockingly, the TV and film star debuted fiery copper hair in place of her usual brunette look.

Megan was joined at the Sports Illustrated Swim Issue Launch Party at the Hard Rock H๏τel by her fiancé Machine Gun Kelly.

Whereas Megan opted for dark tones, MGK matched his bleached hair with a white shirt and suit, paired with silver jewelry.

BACK TOGETHER?On/off couple Megan and MGK were first hit with split rumors in February when it was speculated the rocker cheated on Megan. However, the pair denied a third party was involved.

At the end of April, it was revealed that Megan hadn’t been at her fiancé’s house for days, where he celebrated his 33rd birthday party without her.

MGK held the birthday bash at his lavish $ 7.5million home on April 22, and fans noted there was no sign of Megan in any of the social media pH๏τographs.

He was seen with a group of friends blowing out the candles on his cake with his cat’s face on it, which read: “Happy Birthday Dad!!”

An insider exclusively revealed to The U.S. Sun: “Megan has not been at the house at all, since before his birthday. They were living together even during the cheating rumors before they went to Hawaii.

“They’ve lived in a number of properties and moved to Encino last year when Kelly bought Logan Paul’s former mansion.

“Megan didn’t go to his birthday party which ended up getting shut down by the police, and she hasn’t been around since, they’re on a break again.”

The source continued: “He’s acting like a single man right now, there are always people at the house, plenty of girls, with a ton of flashy cars outside, like the days before he was with Megan.

“When their relationship is good he barely has anyone over, but lately he’s been partying a lot and hanging around with the likes of ModSun, Avril [Lavigne’s] ex.