LOS ANGELES — Sandra Bullock is going to be very busy come the end of summer.

The actress’ film “Gravity” was announced Thursday as the opening-night film of the 70th Venice Film Festival, which runs from Aug. 28 to Sept. 7. This follows the news that the Alfonso Cuaron-directed film, also starring George Clooney, will screen at the Toronto Film Festival just a week later.

In all, 53 feature films will screen at the Venice festival, representing 33 countries. Twenty are in competition for the top prize, the Golden Lion.

James Franco’s writer/director effort “Child of God,” starring the multi-hyphenate and Tim Blake Nelson, will also bow at the festival, screening in competition against such films as David Gordon Green’s “Joe” starring Nicolas Cage, Stephen Frears’ Judy Dench-starrer “Philomena” and Terry Gilliam’s “The Zero Theorem,” starring Matt Damon, Christoph Waltz and Tilda Swinton.

Also in competition are Jonathan Glazer’s “Under the Skin,” starring Scarlett Johansson; Hayao Miyazaki’s latest animated film “Kaze Tachinu,” about Jiro Horikoshi, the man who designed Japanese fighter planes during World War II, and Errol Morris’ documentary on Donald Rumsfeld.