Al Moro, which is situated only a few steps from the Trevi Fountain, has been run by the Romagnoli family since 1929. It is famous for its signature spaghetti and desserts. And also for being Fellini's favorite trattoria. Besides the food, the film director liked the face of the owner Mario Romagnoli and invited him to play Trimalcione in his film
Satyricon. Photos from the shooting still hang on the walls of the restaurant.
Sources: Wikipedia,
https://www.ristorantealmororoma.it,
https://www.imdb.com/