Leonardo DiCaprio, Robert DeNiro And Robert Downey Jr. go to a restaurant…there’s no punchline here – because it really happened on Thursday night!

The three Oscar winners all visited Giorgio Baldi – a chic Italian eatery in Santa Monica… with the Roberts enjoying a night out with their significant others and Leo traveling alone.

All three men were dressed casually…nice jackets and t-shirts – no one wore a full suit. De Niro and Downey were easy to spot and didn’t cover up at all – while Leo wore his usual hat and mask to avoid photographers seeing his face.

We’re told this wasn’t a star-studded coincidence – they met and had dinner together at the same table.

De Niro and DiCaprio have been working together for a long time – first appearing on screen together in the 1993 film This Boy’s Life, when Leo was just 19 years old. Last year they also starred in the Oscar-winning film “Killers of the Flower Moon.”

Downey, on the other hand, hasn’t worked with either man… although he did win his first-ever Oscar earlier this year for his role in Oppenheimer. By the way, he’s back in the Marvel Cinematic Universe.