Star power and Oscar aspirations are reigning at the box office, where the space adventure ‘‘Gravity’’ and the Somali pirate docudrama ‘‘Captain Phillips’’ are holding off all comers. With $31 million over the weekend according to studio estimates Sunday, ‘‘Gravity’’ topped the box office for the third straight week, cementing its status as the juggernaut of the fall movie-going season. It also took in another $33.5 million overseas. The 3-D Warner Bros. movie, staring Sandra Bullock and George Clooney, has now made more than $170 million in three weeks. The film’s groundbreaking visuals have been particularly popular on IMAX screens, where it made an ‘‘Avatar”-like $7.4 million on the weekend. ‘‘Captain Phillips,’’ starring Tom Hanks and directed by Paul Greengrass, also held in second place, taking in $17.3 million in its second week. The Sony film slid only 33 percent from its debut last weekend of $25.7 million. The two movies and their veteran stars were able to keep three new wide releases at bay: the horror remake ‘‘Carrie’’ ($17 million for Sony and MGM), the Sylvester Stallone and Arnold Schwarzenegger action flick ‘‘Escape Plan’’ ($9.8 million for Lionsgate), and the WikiLeaks drama ‘‘The Fifth Estate.’’ The last utterly flopped — a fate predicted by its subject, WikiLeaks founder Julian Assange — taking in a paltry $1.7 million for Disney. It’s the worst debut this year for a film in such wide release (1,769 theaters). In a limited release of just 19 theaters, Steve McQueen’s highly anticipated epic ‘‘12 Years a Slave,’’ starring Chiwetel Ejiofor, opened with $960,000. The exceptionally high theater average of $50,000 suggested audience eagerness for the already much-lauded film. Estimated ticket sales for Friday through Sunday at US and Canadian theaters are according to Rentrak. Where available, latest international numbers for Friday through Sunday are included. Final domestic figures will be released Monday.
“You ready?” — Jimmy Fallon, in a Saturday-night Red Sox-themed tweet to his “Fever Pitch” costar Drew Barrymore.