So in love! Dianna Agron publicly displays her affection for British fiance Winston Marshall and her huge engagement ring in New York City

Dianna Agron showed off her engagement ring on Thursday while kissing fiance Winston Marshall in New York City.

The 29-year-old actress and her 27-year-old British musican beau looked oblivious to the big city as they locked lips amid the hustle and bustle.

Dianna looked typically fashionable in a long black trench coat and shiny black boots. 

Public display: Dianna Agron and fiance Winston Marshall kissed on Thursday while out and about in New York City

The former Glee star had her long blonde hair down and accessorised with her enormous engagement ring and black sunglasses.

Mumford & Sons musician Winston looked rather dapper in a white dress shirt with the top buttons characteristically undone, grey coat and black trousers.

The bearded banjoist had his long dark brown hair down and also accessorised with sunglasses. 

Dazzling diamond: The actress also had her giant engagement ring on display

Tender moment: Winston and Dianna appeared oblivious to the big city

Cute couple: The banjoist and actress got engaged over the holidays

Fashion fan: Dianna hit the fashion week circuit earlier this month and caught shows in Paris and London

Dianna made the rounds earlier this month while checking out the latest offerings on the fashion week circuit.

She rocked the gothic chic look at the Elie Saab show in Paris and also sat front row at the Erdem show in London.

Dianna publicly unveiled her diamond engagement ring to pals Alexa Chung and Daisy Lwe at the Erdem fashion show. 

Shades: Winston and Dianna both accessorised with sunglasses

Holding on: Dianna leaned in as Winston wrapped an arm around her

Big hug: Dianna also wrapped her arms around Winston

Music fans: Winston and Dianna are shown in September 2015 lining up to see the Hamilton musical on Broadway in New York City

The couple got engaged over the holidays after first being romanticall linked in July 2015 when they were spotted strolling hand-in-hand in Paris.

Dianna played Quinn Fabray in the Fox musical series Glee.

She has four films in the works including A Conspiracy on Jekyll Island opposite Minnie Driver, Frank Grillo and John Leguizamo.

Fashion show: Dianna and Winston are shown holding hands in September 2015 after attending the Marc Jacobs show during New York Fashion Week