Scarlett Johansson and Rooney Mara supported the premiere of their new movie "Her" at the 8th Rome Film Festival over the weekend.

They were joined by producer Vincent Landay, director Spike Jonze, co-star Joaquin Phoenix and producer Megan Ellison, AceShowbiz said.

The movie revolves around a romance between a lonely man played by Phoenix and a computer operating system voiced by ScarJo. Also supported by Amy Adams and Olivia Wilde, the sci-fi drama will be released in limited theaters on December 18 and going nationwide on January 10.