Taylor Swift and Travis Kelce Steal the Spotlight!

was hand-in-hand with her fiancé as they joined the star-studded turnout for 's 40th birthday on Thursday.

The couple were among names including ,  and  who headed to the famous Hart pub in London, before celebrations continued with an after party at the luxury BoTree hotel in Marylebone.

Dressed in a chic floral midi dress, Taylor held hands with NFL star Travis as they arrived to the party after travelling to the UK earlier this week.

The pair were previously seen attending 's West End run of Romeo and Juliet, as footage shared on showed them giving the Stranger Things star a standing ovation at the show on Wednesday.

Taylor accessorised her look with a £1,440 sage green JW Anderson Loafer handbag, while Travis sported a grey embroidered suit and a silver necklace as they made their way into the venue.

Also in attendance was a visibly-pregnant and her sister Beatrice, with the former's baby bump as she arrived with her thrilled husband .

Speculation has been rife around Taylor and Travis' upcoming wedding, with the Daily Mail

It was previously speculated that the couple would say 'I do' at her lavish Rhode Island estate. 

Guests who received an invitation have also been required to RSVP with a signed NDA to help keep details of the nuptials private, per a source. 

The exact location of the wedding is not known, but it is said to be an arena or museum-like space.

Last year in August, Kelce popped the big question and Swift shared photos from the intimate engagement on Instagram with the caption: 'Your English teacher and your gym teacher are getting married.'

The sports player had turned his backyard in Kansas City into a secret garden wonderland, which offered a romantic atmosphere.

He had asked Swift to marry him shortly after they recorded an episode of his New Heights podcast together.

It has also previously been claimed that she has asked some of her celebrity pals to be her bridesmaids, including Selena Gomez and Gigi Hadid. 

Taylor recently admitted it’s a ‘little weird’ the way her fans try to figure out who she writes about in her songs.

The Life Of A Showgirl star is famous for using her personal life as inspiration for her tracks and her devoted followers spend a lot of time trying to unpick her lyrics in a bid to work out who each song is about.

In an interview with New York Times Magazine, she explained: 'There’s corners of my fanbase that are going to take things to a really extreme place.

'There’s nothing that I can do about that. There’s people who are going to try to like, do detective work, figure out the details - who is that about? What is this?

'When it gets a little bit weird for me is when people act like it's sort of like a paternity test. Like: "This song's about this person." Because I'm like: "That dude didn't write the song. I did."'

However, Swift is adamant she doesn't let others' 'perception' of her work influence her.

'You have to hold tight to your perception of your art and your relationship with it, and then you just have to [think]: "There it goes, hope you like it! If you don’t now, hope you do in five years! And if you never do, then I was doing it for me anyway."' 

In the interview, Swift went on to reveal her hit track Love Story - which was released in 2008 - was one of the first tracks she wrote without worrying about what other people thought of it.

She said she penned the song when she was 17 and angry with her parents because they refused to let her date an older boy.

Swift also admitted that her real life is still influencing her writing.

One of her most recent tracks, Elizabeth Taylor from The Life of A Showgirl, came to fruition following a passionate rant about her admiration for the late actress during a car journey with her fiance.

The singer described that the tune popped into her head as soon as she got out of the car and she was 'scrambling' to record the melody on her phone before she forgot it.