Uncle Jimmy? Ali Larter is pregnant and expecting her second child with actor husband Hayes MacArthur. The actress made the announcement—and showed off her adorable baby bump—during an appearance on The Tonight Show With Jimmy Fallon on Friday, Aug. 8.

"Last time you were here was three years ago and you were pregnant on the show," Fallon said.

"Yeah, I came on and it was pregnant and it went so well," Larter, 38, gushed. "So I told my husband I was going on Fallon so I gotta get pregnant!" The Diabolical star then jumped up to rub her growing belly. 

"It's such a scary time and I've been trying to hide it as much as I can," Larter admitted. "I was still shooting my [TV] spy drama [Legends]—so I have to be a covert spy in my own life too. I've been wearing blazers and push up bras. Anything to distract my bump."

The Heroes alum and MacArthur, 37, tied the knot in August 2009. Us broke news in December 2010 that they had welcomed son Theodore.