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 when Taylor Swift turned 34 on Wednesday.

And leading the A-list attendees was Blake Lively, who celebrated her BFF's big day at posh New York City restaurant Freemans before heading to The Box nightclub, along with Gigi Hadid and many others.

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

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

She teamed the look with a chic clutch bag and a pair of statement gold earrings, while adding a vampy touch with a touch of dark lipstick.

It was a night of the stars when Taylor turned 34 on Wednesday

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

Blake, who is married to Ryan Reynolds, looked as glamorous as ever in her eye-catching ensemble as she stepped into the A-list bash.

Missing from the action was her boyfriend Travis Kelce, who a source told DailyMail.com is “very excited” to celebrate with her (they were pictured together in October)

Taylor and Blake have been friends for almost a decade after famously hooking up in 2015. Like the Fearless singer, Blake and her family live in New York City.

Taylor and Blake have been friends for almost a decade after famously hooking up in 2015. Like the Fearless singer, Blake and her family are based in New York City.

Missing from the event was Taylor's boyfriend Travis Kelce, who, according to a source to DailyMail.com, is “very 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.

Many more flower deliveries arrived throughout the day, and a party truck was also seen picking up the remains of a fun evening at her apartment.

She enjoyed a PDA-filled pre-birthday party 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.

Since Travis is currently back in Kansas City for mandatory training, he was absent 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 enviable Chanel handbag

She waved to admirers as she entered the party in style

However, insiders revealed that 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 will be with her and he's very nervous because he wants this to be her best birthday ever,” a source told DailyMail.com of her birthday.

“It's not about gifts for him, even if he gets gifts for her, but he wants to give her an experience that will probably be more than just today,” she added.

“He wants to take charge at Christmas and New Year and make it all about her,” the source continued.

'He wants to be with her as often as possible and after the season he wants to go on tour with her.

“They're going to take their romance all over the world,” the insider said of the long-distance couples' vacation plans. He's really excited to make her feel like a princess.”

She looked phenomenal in her designer ensemble

The best friends looked ready to party the night away as they held hands upon their arrival at the glitzy party