Ali Larter is pregnant  with her second baby! The actress announced her and husband Hayes MacArthur's big news on The Tonight Show Starring Jimmy Fallon on Friday. "Hey, buddy! I can't wait to meet you," Jimmy Fallon said while leaning over his desk and talking to her baby bump. Ali said she's intentionally kept her pregnancy a secret the past few months. "I've been trying to hide as much as I can, and when you're in the public eye, it's really scary in the beginning," she told Jimmy. Both stars joked about how her appearance was the perfect time to let the world know — as it turns out, she stopped by Jimmy's former show, Late Night With Jimmy Fallon, the last time she was pregnant. It's been nearly four years since the actress gave birth to her first child, Theodore Hayes MacArthur . Watch the video above to hear all about Theodore's reaction and Ali's maternity style!