Thrilling forum

Very short, uncredited role in Da Berlino l'apocalisse (1967) as Julien's girl.
She only appears in the first scene of the film - in a car together with the protagonist Julien Saint-Dominique (Roger Hanin), who disappoints her by declaring he is leaving to go off on a mission and then kisses Rossella goodbye.

00/Ciak operazione mondo (1966) - poster credit. Image upgraded −Emiliano

A brief uncredited role in 7 donne per i MacGregor (1967) as Girl waiting for the stagecoach.

From the opening credits of 100 ragazze per un playboy (1967).
I've seen the movie and I didn't notice her.

In Ric e Gian alla conquista del West (1967) as The false widow.

Cuore matto... matto da legare (1967) credited, as Sandro's girlfriend

Un uomo chiamato Dakota (1972) as Rosie
This hard to find western had no credits on the Net, but i found this poster credit and the best picture I could choose from this copy.

Milano calibro 9 (1972), as Americano's entraîneuse, credited as "Rosella Bergamonti" had this as the portrait photo only. Film and credit shot(s) added

Il commissario De Vincenzi (1974) (TV series) - season 1, episode 3: "Il mistero delle tre orchidee" (Part 1) credited, as Model.

This looks to have been Rossella's final acting role.

Un dollaro tra i denti (1966)), as Servant to Aguilar's gang (credited). Nearly always shown from the side, first pic shows her intentionally out of focus.