Blake Lively wows in a sizzling leather dress with a plunging neckline and racy split as she parties with the stars at Taylor Swift's 34th birthday in NYC

It was a night of the stars as Taylor Swift turned 34 on Wednesday.

And leading the A-list attendees was Blake Lively, who was celebrating her BFF’s big day at upscale New York City restaurant Freemans before heading to The Box nightclub, alongside Gigi Hadid and many others.

The Gossip Girl star, 36, looked phenomenal in a sizzling Michael Kors Collection leather dress with a racy thigh split and a plunging neckline as she strutted her stuff at the bash.

The split afforded a look at her lithe legs, clad in patterned tights, while she upped the drama of the ensemble with a pair of Victoriana Christian Louboutin boots.

She paired the look with a chic clutch bag and a pair of bold gold earrings, while adding a vampish touch with a slick of dark lipstick.

Blake Lively sends pulses racing in daring leather dress

Blake Lively was celebrating her BFF Taylor Swift’s big day at upscale New York City restaurant Freemans before heading to The Box nightclub, alongside Gigi Hadid and many others

It was a night of the stars as Taylor turned 34 on Wednesday and Blake sent temperatures soaring in a black leather dress from the Michael Kors Collection

Blake flashed a huge smile for the cameras as she supported Taylor by linking arms with her for the big night

Blake, who is married to Ryan Reynolds, looked as glamorous as ever in her attention-grabbing ensemble as she strutted into the A-list bash

Missing from the action was her boyfriend Travis Kelce, who a source told DailyMail.com is ‘really excited’ to celebrate with her (they are pictured together in October)

Taylor and Blake have been friends for nearly a decade after famously hitting it off in 2015. Like the Fearless singer, Blake and her family are based in New York City

Taylor and Blake have been friends for nearly a decade after famously hitting it off in 2015. Like the Fearless singer, Blake and her family are based in New York City.

Missing from the action was birthday girl Taylor’s boyfriend Travis Kelce, who a source told DailyMail.com is ‘really excited’ to celebrate with her.

An insider exclusively told DailyMail.com this week that Swift is ‘really excited’ for her NFL star boyfriend to meet her friends and celebrate with her.

The source also said the Kansas City Chiefs tight end is ‘nervous’ because he wants to spoil her and make it ‘the best day ever’ for the superstar.

There were many other flower deliveries arriving throughout the day, and a party truck was also seen arriving picking up the remnants of a fun night at her apartment.

She enjoyed a PDA-filled, pre-birthday celebration with Travis and his mother Donna in Kansas City, Missouri before jetting off to New York on Tuesday.

They were also joined by Travis’ teammate, quarterback Patrick Mahomes, and his wife Brittany.

As Travis is currently back in Kansas City for a mandatory training, he was absent on Tuesday night when Taylor kicked off her birthday celebration at Manhattan’s Zero Bond with BFF Selena Gomez, 31, and actor Miles Teller, 36.

Taylor was joined by her best friend Blake for her birthday bash, and the pair sweetly walked hand-in-hand

She paired the look with an envy-inducing Chanel handbag

She was waving at admirers as she stepped into the bash in style

However, insiders revealed he is reportedly keen to continue celebrating her special day throughout the holiday, and even into 2024, with plans to join her on tour.

‘Travis is going to be with her and he is really nervous because he wants this to be her best birthday ever,’ a source told DailyMail.com about her birthday.

‘It isn’t about gifts for him, though he will be getting gifts for her, but he wants to provide an experience for her that is likely going to be more than just today,’ they added.

‘He is looking to lead things into Christmas and the New Year and have it be all about her,’ the source continued.

‘He wants to be with her as often as possible and after the season he intends to join her on tour.

‘They are going to take their romance all over the world,’ the insider said about the long-distance couples’ holiday plans. He is very excited to make her feel like a princess.’

Taylor Swift’s 34th birthday bash! Superstar stuns in black dress