It was the celebrity party of the year with a VIP guestlist including Jennifer Aniston, Oprah, Adele, Leonardo DiCaprio- and her ex Chris Martin.

And Jennifer Lawrence dazzled as she stepped out at Ellen DeGeneres‘ star-studded birthday party at the Lot Studios in West Hollywood on Sunday – and narrowly avoided an awkward run-in with her Coldplay rocker former beau.

The Oscar-winning actress, 27, put on a leggy display in a daring silk gown which featured a racy split up one thigh, showcasing her toned pins as she walked along with a group of pals – which included P Diddy, Amy Schumer and French Montana

Leggy: Jennifer Lawrence dazzled as she stepped out at Ellen DeGeneres’ star-studded birthday party in LA on Sunday- and narrowly avoided an awkward run-in with ex Chris Martin

Past flame: Chris, 40, was seen hand-in-hand with new girlfriend Dakota Johnson, 28 at the party (above chatting to Drew Barrymore)

Flaunting her honed figure and a hint of cleavage, the dress sported a plunging neckline and button detail down the bust, before cinching in at her slender waist and flowing into a dramatic skirt.

Adding height to her look, she donned strappy stiletto sandals.

Her blonde tresses were styled into bouncy waves and parted on the side while her sparkling peepers were enhanced with smoky make-up and statement lashes.

Toned: The Oscar-winning actress, 27, put on a leggy display in a daring silk gown which featured a racy split up one thigh, as she chatted to a stylish pal

Glamorous: Flaunting her honed figure and a hint of cleavage, the dress sported a plunging neckline and button detail down the bust (above with pals P Diddy and Amy Schumer)

Stunning: Her blonde tresses were styled into bouncy waves and parted on the side while her sparkling peepers were enhanced with smoky make-up and statement lashes

Fun times: Keeping her accessories simple and sparkling, the Silver Linings Playbook star wore glittering stud earrings and a gold medallion necklace

Keeping her accessories simple and sparkling, the Silver Linings Playbook star wore glittering stud earrings and a gold medallion necklace.

Looking relaxed as she chatted with friends and held onto a denim jacket and present, the star avoided running into her 40-year-old ex boyfriend Chris, who she dated on-off for a year in 2014.

The Fix You singer was seen hand-in-hand with new girlfriend Dakota Johnson, 28 at the party, with the guestlist also featuring his ex wife Gwyneth Paltrow, 45 and her new fiance Brad Falchuk.

Chatty: Jennifer looked in great spirits as she headed into the party where ex Chris was

Smile: Jennifer’s handsome pal looked delighted to be in the star’s company as they walked

Blonde beauty: Jennifer showed off her killer legs as she strutted along in the glam gown

A-list: Diddy and Amy Schumer looked casually cool as they joined Jennifer at the party

Busty: The star flashed a hint of cleavage as she headed into the party

Chris has been romantically linked to Fifty Shades Freed star Dakota since October as they attended a Stella McCartney Autumn 2018 Collection event in Los Angeles at the time.

The Yellow hitmaker was married to Gwyneth for ten years as they announced their separation in March 2014. It was finalized in July 2016.

Chris dated Jennifer shortly after his conscious uncoupling with Gwyneth in August 2014.

Dapper: P Diddy, real name Sean Coombs, looked stylish in a black fitted suit as he followed the actress in

Circle of friends: Jennifer looked undeniably stylish as she headed into the bash

Banter: Diddy and his pals all smiled as Jennifer chatted to them en-route to the dancefloor

PDA: Chris has been romantically linked to Fifty Shades Freed star Dakota since October and held hands with her as they chatted to Drew Barrymore and a mystery man

They dated for five months before splitting in October of that year only to reunite in January 2015. Ultimately their love didn’t last as they broke up for the final time in August 2015.

The VIP guest list also included power players like Amy Schumer, Reese Witherspoon, Kim Kardashian, Drew Barrymore, Olivia Munn and P Diddy.

Music stars joined in the fun too including Jennifer Lopez, Adele, Melissa Etheridge and John Legend, who took along his pregnant wife Chrissy Teigen.

Close to you: Chris couldn’t keep his hands off the brunette beauty as they waited outside