Megan Fox looked sensational as she left her hotel in London on Wednesday evening with her on-again love Machine Gun Kelly.

The actress, 37, put on a busty display in a figure-hugging grey dress, teamed with knee-high boots as she headed to Apollo's Muse members club for the Marc Jacques Burton X Machine Gun Kelly party.

She completed the look with a stylish black jacket, which she wore off-the-shoulder, and a chic handbag. 

Megan opted for a flawless bronzed makeup look with a glossy nude lip, while her auburn tresses were styled in loose curls.

She held hands with her rockstar fiance, who emerged in a fuzzy black tracksuit with a matching bucket hat.

MGK took to the stage to perform at the exclusive bash, which saw stars including Lottie Moss and Roxy Horner dance the night away surrounded by 2,000-year-old Greek and Roman antiquities whilst enjoying a bespoke cocktail menu featuring Don Julio 1942.

It comes after Megan and Machine Gun Kelly put on a loved-up display as they stepped out in London together on Wednesday evening.  The couple put on a united display as they brushed off speculation over their on-off relationship. 

The star looked incredible as she went braless in a white crop top, teamed with high waisted black trousers which had a silver diamante chain. She elevated her height in stylish platform heels and carried a small black handbag.

Machine Gun Kelly, real name Colson Baker, 33, looked typically stylish and flashed his inked skin as he went shirtless in a grey waistcoat.