Sophie Turner clutches onto a Colin The Caterpillar cake as she joins fiancé Joe Jonas on a night out in London... ahead of her birthday next week

It's her 23rd birthday next Thursday.

And, Sophie Turner appeared to be starting the celebrations early as she held onto an M&S Colin The Caterpillar cake while on a night out in Mayfair, London with her fiancé Joe Jonas, on Wednesday.

The Games Of Thrones star, 22, nailed casual chic in light-wash jeans and a green and black bomber jacket.

Birthday girl: Sophie Turner, 22, appeared to be starting her birthday celebrations early as she held onto a Colin The Caterpillar cake while out in Mayfair, London

Birthday girl: Sophie Turner, 22, appeared to be starting her birthday celebrations early as she held onto a Colin The Caterpillar cake while out in Mayfair, London

Keeping the rest of her outfit simple, Sophie wore a plain white T-shirt and slipped into a pair of black Louis Vuitton plimsoles. 

Rocking the multi-bag trend, the actress carried a Louis Vuitton drawstring rucksack over her shoulder, in addition to the long gold chain strap of a chic black handbag.

Her blonde tresses were scraped back into an elegant ponytail, and she opted for a minimal make-up look.

Sophie accessorised with gold hoop earrings, and wore a pair of black sunglasses atop her head, despite the lack of sunlight. 

Lucky man: The Games Of Thrones star was joined by her fiancé Joe Jonas, 29

Lucky man: The Games Of Thrones star was joined by her fiancé Joe Jonas, 29

Stylish: Sophie nailed casual chic in light-wash jeans and a green and black bomber jacket

Stylish: Sophie nailed casual chic in light-wash jeans and a green and black bomber jacket

Simple: Keeping the rest of her outfit simple, Sophie wore a plain white T-shirt
Simple: Keeping the rest of her outfit simple, Sophie wore a plain white T-shirt

Simple: Keeping the rest of her outfit simple, Sophie wore a plain white T-shirt

On trend: Rocking the multi-bag trend, the actress carried a Louis Vuitton drawstring rucksack over her shoulder, in addition to the long gold chain strap of a chic black handbag

On trend: Rocking the multi-bag trend, the actress carried a Louis Vuitton drawstring rucksack over her shoulder, in addition to the long gold chain strap of a chic black handbag

The talented actress appeared to be clutching onto presents, as well as her cake, as she made her way through the street.

Meanwhile, Joe, 29, cut an equally casual figure in a pair of dark jeans, which he teamed with an indigo denim shirt.

The musician layered up with a similarly hued jacket, and strode along in blue trainers.  

Beauty: Her blonde tresses were scraped back into an elegant ponytail, and she opted for a minimal make-up look

Beauty: Her blonde tresses were scraped back into an elegant ponytail, and she opted for a minimal make-up look

Dripping in designer: Sophie slipped into a pair of black Louis Vuitton plimsoles

Dripping in designer: Sophie slipped into a pair of black Louis Vuitton plimsoles

Couple goals: The pair appeared to be out celebrating Sophie's upcoming birthday
Couple goals: The pair appeared to be out celebrating Sophie's upcoming birthday

Couple goals: The pair appeared to be out celebrating Sophie's upcoming birthday

Dapper: Joe cut an equally casual figure in a pair of dark jeans, which he teamed with an indigo denim shirt

Dapper: Joe cut an equally casual figure in a pair of dark jeans, which he teamed with an indigo denim shirt

In October, Joe got a tattoo with his fiancée.

The lovebirds got the phrase 'To infinity & beyond' on their inside wrist; on Joe's hand it read 'To infinity' and on Sophie's it read '& beyond.'

The saying is the Toy Story character Buzz Lightyear's catchphrase. The sweet inking was done by tattoo artist Mr. K at Bang Bang Tattoos in New York City

According to Page Six, the DNCE frontman and the actress also got matching tattoos in July 2018.

They both inked their hand with tributes to their grandfathers.

Joe and Sophie got engaged in October 2017 after dating for a year.

Easy does it: The musician layered up with a similarly hued jacket, and strode along in trainers

Easy does it: The musician layered up with a similarly hued jacket, and strode along in trainers

Joe also enjoyed a lads night out with brothers Kevin and Nick as they were spotted exiting a limo together
Kevin Jonas
Nick Jonas

Siblings: Joe also enjoyed a lads night out with brothers Kevin, center, and Nick, right, as they were spotted exiting a limo together

Out on the town: Nick, 26, was thousands of miles away from his wife Priyanka Chopra who was seen at New York Fashion Week on Wednesday

Out on the town: Nick, 26, was thousands of miles away from his wife Priyanka Chopra who was seen at New York Fashion Week on Wednesday

Former band members: Kevin and Nick were seen going with Joe to a restaurant and then a casino and bar before heading back to their hotel