Stars are descending on Rome for its annual film festival. Jared Leto was at restaurant Antica Pesa in the Eternal City over the weekend for a premiere of “Dallas Buyers Club,” in which he has a buzzed-about role as an HIV-positive transgendered woman. As Leto left for a Vanity Fair bash, Joaquin Phoenix arrived at the eatery. Phoenix is in town with Scarlett Johansson for their film “Her.” Also at the VF dinner were Italian socialites Lapo and Ginerva Elkann and Alex Dellal.