The caveman comedy ‘‘The Croods’’ opened at No. 1 with $44.7 million, according to Sunday studio estimates. The 3-D adventure from DreamWorks Animation and 20th Century Fox features a voice cast including Nicolas Cage, Emma Stone, and Catherine Keener. They play a prehistoric family encountering danger and strange new creatures when they’re forced to find a new cave. Opening strongly in second place with $30.5 million was ‘‘Olympus Has Fallen,’’ an action thriller from ‘‘Training Day’’ director Antoine Fuqua in which North Korean terrorists take over the White House. Gerard Butler, as a Secret Service agent, leads an all-star cast that includes Aaron Eckhart as the president, Morgan Freeman, and Angela Bassett. ‘‘The Croods’’ has now made $108 million worldwide, also opening this weekend in Russia, the United Kingdom, Germany, and Spain. In the United States, it’s the only game in town as far as animated films for the whole family, and it will continue to be so as kids head out of school for spring break over the next couple of weeks. ‘‘Olympus Has Fallen’’ also opened higher than expectations — much higher — given that FilmDistrict figured it would end up somewhere in the under-$20 million range, said president of distribution Jim Orr. This is by far the biggest debut for the independent distributor, which was founded in September 2010; the previous best was the $14.3 million the ‘‘Red Dawn’’ remake made over last year’s Thanksgiving weekend. This weekend’s haul is down 34 percent from the same weekend a year ago, when the juggernaut of ‘‘The Hunger Games’’ debuted. It made a whopping $152.5 million in its opening, which is more than all the films in theaters combined will have made this weekend. Among the other new films this weekend, the Tina Fey-Paul Rudd college comedy, ‘‘Admission,’’ from Focus Features opened in fifth place with just $6.4 million. The buzzed-about ‘‘Spring Breakers’’ from A24 Films, featuring Selena Gomez and Vanessa Hudgens, did well in its first nationwide expansion. It made $5 million on 1,104 screens for a total of $5.4 million over the past two weeks. Estimated ticket sales for Friday through Sunday at US and Canadian theaters, according to Hollywood.com. Final domestic figures will be released Monday.
Swinton at MoMA