LOS ANGELES — The God of Thunder reigned at the North American box office as “Thor” became the latest Marvel comic book superhero to leap to the big screen.

According to studio estimates issued Sunday, “Thor” sold about $66 million worth of tickets during its first three days of release across the United States and Canada.

The opening was in line with industry forecasts in the $60 million to $70 million range, and marked a strong start for a non-sequel and for the lucrative summer movie-going period.

Last weekend’s North American champion, “Fast Five,” slipped to No. 2 with $32.5 million, but it replaced “Thor” as the top choice overseas.

“Jumping the Broom” opened at No. 3 with $13.7 million, doubling its $6.6 million production cost.