It looks like Ali Larter's family is going to get bigger once again!

The 'Varsity Blues' and former 'Heroes' star revealed on 'The Tonight Show With Jimmy Fallon' last night, Aug. 8, that she is pregnant with her second child.

Before joining Fallon on camera, Larter teased her announcement to fans on Twitter, saying, "Backstage at @fallontonight I'm going to surprise @jimmyfallon with some big news!"

The 38-year-old actress gave birth to her first son, Theodore, in 2010. Larter is married to Hayes MacArthur, a stand-up comedian and actor. The two met on the set of the movie, 'National Lampoon's Homo Erectus.' The two had dated for three years before getting married in 2009.

Larter is currently starring as the female lead in the TNT's 'Legends.' The show stars Sean Bean as an undercover FBI agent who changes his identity for each case he works on. Larter plays Crystal Quest, an operative who has a history with Bean's character. The show premieres on TNT this Wednesday, Aug. 13.

Congratulations to Larter and MacArthur on their upcoming bundle of joy!