"I have a five year old and my daughter's 19 months, and we're expecting a third," Daly said on the show. "For years my mom was like, 'When are you going to have a kid?' And now she's like, 'Slow down!'"
Daly and his food blogger fiancee welcomed their first son Jack in March 2009. The couple's second child, a daughter named Etta Jones, was born in September 2012. The couple became engaged in October 2013.
Daly, a Today Show correspondent, also talked about his new gig during his interview with Fallon.
"I tell people The Today Show is like TRL for adults," he quipped.