Leonardo DiCaprio still king of the world at 49! Titanic star takes over microphone to RAP in front of A-list crowd inside his wild birthday party

Leonardo DiCaprio was seen rapping and dancing in front of a star-studded crowd that gathered in Beverly Hills, California on Saturday to celebrate the Oscar-winner's 49th birthday.

The A-lister, 49, was seen being hoisted on a chair at the gathering, and later rapping into a microphone along with the 1994 song DWYCK from Gang Starr and Nice & Smooth.

The Titanic leading man donned a casual ensemble of a black T-shirt, jeans and a black baseball cap at the gathering in his honor, in a room decorated with dozens of balloons.

The Killers of the Flower Moon star was joined by new girlfriend Vittoria Ceretti, 25, as well as celeb guests such as Beyonce and husband Jay-Z, Lady Gaga and Kim Kardashian.

Also at the birthday bash were Salma Hayek, Chris Rock, Kate Beckinsale, Zoe Kravitz and Channing Tatum, Rita Ora, Zoe Saldana and Snoop Dogg.

The soiree for The Departed star drew an A-list crowd from all corners of Hollywood, from movies, music and even reality television, with a strict guest list organizers adhered to. 

On a Reddit thread in which fans commented on DiCaprio's performance, many likened it to Succession's Kendall Roy (played by Jeremy Strong) rapping on the 2019 episode Dundee.

'How Kendall Roy of him,' one user wrote, while another said, 'First thing I thought when I saw this.'

One fan said, 'I opened this thread literally praying this would be the top comment.'

In the storyline of the HBO show, Kendall performed in a surprise rap at an event in Scotland honoring his father Logan Roy (Brian Cox). The unexpected outing has spawned multiple memes.

Kardashian was among the celebrities attending the Oscar-winning star's birthday bash Saturday. The 43-year-old icon was spotted departing the bash wearing a sleeveless black outfit and with her face flawlessly done-up.

DiCaprio and Ceretti packed on the PDA and were 'affectionate and kissing throughout the night,' according to an insider. 

Saldana was joined by husband Marco Perego as they headed to the gathering following their appearance at the Baby2Baby gala.

At one point the actor was 'raised and carried around the room' in celebration, as per People. 

The Revenant star, his model girlfriend, and their celebrity friends kept the party going past 4:00 am, according to the publication. 

Earlier this month it was reported that DiCaprio is 'crazy' about the supermodel, who turns 26 in June, with insiders claiming he is now dating her exclusively as she has 'all of the qualities he looks for in a partner'. 

DiCaprio - who has a reputation for only dating women age 25 or under - and the Italian beauty were first linked in August, when they were seen together in Santa Barbara, California. The pair were then spotted together again in early September, dancing and kissing in Ibiza.

Meanwhile Wilde and fellow singleton Rock were seen laughing it up in the car as they left the party together.

Wilde sported a crew neck white T-shirt and rocked thin, winged black liquid eyeliner. And Rock, 58, was casually dressed in black pants, a gray crew neck shirt and a black jacket.

He flashed his megawatt grin as the unlikely pair seemed to be enjoying each other's company.

It comes nearly one year after Olivia's almost two-year relationship with British singer Harry Styles came to an end.

The former One Direction star is now romancing actress Taylor Russell, with whom he recently attended a U2 concert. Prior to her coupling with Styles, she was in a long-term relationship with actor Jason Sudeikis.

The two are co-parents to son Otis, nine, and daughter Daisy, seven. Their pairing came to an abrupt end when she sparked a flame with Harry while shooting her film Don't Worry Darling.

As for Rock, he was linked to fellow comic Lake Bell throughout 2022 — and she ironically hung out with Sudeikis at a Guns 'N' Roses concert earlier this month.

A source also confirmed to DailyMail.com that Jason and Lake are not a romantic couple, but 'just friends.'

Snoop Dogg, 52, was seen arriving to the bash in a black SUV as he stuck his head out of the backseat window.  

Saldana and her husband coordinated in a black and white color palette. The Colombiana actress flashed her cleavage in a low-cut white dress with a black rose print throughout. The thigh-grazing frock featured an attached sarong-like wrap with a side tie.

The acclaimed performer showed off her long legs in the fashionable ensemble, finishing with a pair of black Mary Jane-style high heels. 

Beckinsale cut a very glitzy display in a bejeweled bodysuit as she arrived. The actress, 50, was joined by stylish Ora, 32, who donned a glamorous black mini dress, paired with a sophisticated overcoat.

Beckinsale turned heads in her statement-making ensemble as she arrived with a helping hand from a friend after opting to wear towering platform heels. 

Other famous faces who made their way to the celebration included newly engaged Zoe Kravitz and Channing Tatum. They were seen arriving in the backseat of a luxury black car.

The High Fidelity actress' raven-toned locks were styled in micro braids and she wore a black coat. 

Ora and husband Taika Waititi also opted for black getups as they headed to the swanky bash.

The singer-songwriter showed off her sense of style in a clinging, short, satin dress. The low-cut number flaunted her perky chest and she topped the look with a long, coordinating coat.

Ora put on a leggy display in the look, slipping her stems into a pair of sheer black pantyhose. 

For his part, Waititi wore a button-up shirt with a side pocket over a white tank top. 

Rapper 2 Chainz looked impeccable in a loose-fitting, casual black velvet suit teamed with black footwear. 

Kris Jenner's longtime beau Corey Gamble made an appearance at the shindig as well. 

Casey Affleck and Caylee Cowan made their appearance at the function a date night.

Affleck, Ben Affleck's younger brother, was dressed in light wash blue jeans and a crew neck blue sweater. 

Emile Hirsch was also there, dressed in belted black jeans, a button-up shirt, and a black leather jacket.