Al Pacinocouldn’t even recognizeJared Letoon the set of the much-anticipated filmHouse of Gucci.

In anappearance onThe Tonight Showwith Jimmy Fallon on Tuesday, the 49-year-old actor shared the story of a hilarious encounter between the two on the set ofHouse of Gucci.

Leto said the first day of filming, he showed up while costumed as Paolo and greeted Pacino, 81, with an Italian accent.

“I showed up for the first day of work in character and I went up and said ‘papa,’ you know, papa in an accent, and he looked over and said ‘papa’, and he looked over and kind of just skirted away from me,” said Leto, drawing laughter from the crowd and Fallon.

“I said, ‘Oh, maybe he is a little grumpy, I don’t know.’ I said, ‘papa, it’s me Paolo,’ and he basically shuffled off again like, ‘Who is this creep?’ "

Eventually, someone on the set whispered in Pacino’s ear that the mystery man was, in fact, Leto.

“And he turned around, he said ‘Oh, my son! My son!’ " said Leto.

MGM Studios

Jared Leto in House of Gucci

In addition to Leto and Pacino,House of GuccistarsLady GagaandJeremy Irons,Salma Hayek,Reeve Carney,Jack HustonandAdam Driver.

Leto also opened up about what it was like to work with Scott, who he called one of the “best directors in the world.”

“He can do anything, from alien, gladiator, to the martian,” he said speaking about Scott. “The guy just made some of my favorite films of all time.”

The Tonight Show Starring Jimmy Fallon

Jared Leto

Leto also opened up about the Gucci family dynasty and why people should see the movie in theaters this month.

“I do have a lot of people coming up to me really interested in seeing this film. I didn’t know the story of the Gucci family. I am sure a lot of people out here don’t know the story of the Gucci family and it is shocking,” he said.

“It’s a shocking story about this dynasty. It is just Machiavellian and Shakespearean and all the ends. It is an amazingly complex story and I am really proud to be part of it.”

House of Guccipremieres in theaters on Nov. 24.

source: people.com