One of Hollywood’s biggest names left fans doing a double take as he stepped into the shoes of a real-life gangster for his latest role. 

The 71-year-old Oscar nominee, who starred opposite Sissy Spacek in Carrie, was spotted filming in Winnipeg, Canada for the upcoming thriller November 1963, which centers around the events surrounding JFK’s assassination.

He wore a sharp navy suit, a dark maroon fedora, and vintage shades as he stepped into the role of Johnny Roselli — a real-life Chicago mobster allegedly recruited by the CIA to help assassinate Fidel Castro in the ’60s.

Even in full costume, the silver screen icon showed flashes of his old charm.

At one point, he nimbly hopped over obstacles, a nod to the fancy footwork he once flaunted in Grease and his iconic dance scene with Uma Thurman in Pulp Fiction.

So who’s the Hollywood heavyweight behind the disguise?

A silver screen favorite just pulled off a jaw-dropping transformation — ditching his signature look to channel a notorious mobster from America’s darkest chapter

Cameras caught the 71-year-old film legend on the streets of Winnipeg, where he was deep in character for November 1963 — a thriller digging into the murky underworld tied to JFK’s assassination

Believe it or not… it’s John Travolta!

His latest project is a historical thriller that dives deep into the Mafia’s rumored ties to the assassination of President John F. Kennedy.

The film is based on firsthand accounts from the family of Sam Giancana, the infamous Chicago mob boss whose inner circle overlapped with Kennedy’s.

Giancana was long rumored to have played a behind-the-scenes role in JFK’s death, carried out by Lee Harvey Oswald on November 22, 1963, in Dallas.

Adding to the intrigue, Giancana was shot dead in his home in 1975, just before he was scheduled to testify before the Senate.

Dermot Mulroney stars as Giancana’s top hitman Chuckie Nicoletti, with Mandy Patinkin as consigliere Anthony Accardo.

Robert Carlyle plays Jack Ruby — the man who gunned down Oswald on live TV.

Rounding out the cast, Jefferson White portrays Oswald, while Thomas Fiscella takes on the role of Giancana.

Showing off quick moves, he easily leapt over obstacles — a subtle throwback to the slick dancing that made him famous in Grease and that unforgettable Pulp Fiction scene with Uma Thurman

Dressed in a crisp navy suit with a maroon fedora and retro shades, he fully embodied mobster Johnny Roselli, a key player in the CIA’s rumored plot to kill Castro

Despite the heavy makeup and costume, the Hollywood legend couldn’t hide glimpses of his classic charisma

It’s John Travolta — and his new film plunges into the shadowy world of the Mafia’s alleged connection to JFK’s assassination

Travolta’s shocking transformation comes on the heels of another nostalgic moment, when he stepped back in time to reprise his role as Danny Zuko from the 1978 hit musical at a surprise concert in June

Travolta’s shocking transformation comes on the heels of another nostalgic moment, when he stepped back in time to reprise his role as Danny Zuko from the 1978 hit musical at a surprise concert in June.

Fans were taken aback after the actor, who has been sporting a shaved head, donned a wig styled into a greaser-friendly ducktail, along with a scruffy beard.

Taking the microphone, Travolta delivered some of his iconic lines from the moment Danny Zuko reunites with his Summer Nights sweetheart Sandy (played by the late Olivia Newton-John) on the first day of school at Rydell High.

‘Tonight at the Hollywood Bowl, for the first time I surprised everyone at the GREASE Sing-A-Long and dressed up as Danny Zuko,’ the Oscar nominee shared on social media at the time.

‘No one knew. Not even the cast. Thank you for a great evening,’ he said.

The jaw-dropping moment left the crowd cheering — and clearly, Travolta isn’t done surprising fans just yet.