The 40-year-old Today correspondent announced her pregnancy on the morning program Friday. Wolfe and Gosk, an NBC News foreign correspondent, have been together for four years, and are already parents to one-year-old daughter Harper Estelle.
"Harper is going to be a big sister," she revealed on-air. "I figured I got pregnant, I did it right the first time. I'm just going to do the exact same thing again and we're going to hope for the best."
Wolfe is the latest of her Today show colleagues to have baby news. Anchor Savannah Guthrie gave birth to her first child, daughter Vale Guthrie, on August 13, and media correspondent Carson Daly welcomed his third child, daughter London Rose, on Wednesday.