Kate Mara and Jamie Bell, who played the superheroes in the 2015 reboot film, are engaged, the actress' rep told E! News exclusively Friday. The news comes soon after Mara was photographed walking in New York City wearing a ring with a large stone on her ring finger. Mara, 33, and Bell, 30, had sparked engagement rumors last year after the actress was seen wearing a different ring on her ring finger. Mara and Bell met on the set of Fantastic Four in 2014.