Jimmy Fallon is finally opening up about his wife's struggle to get pregnant revealing their new baby girl was born via surrogate. In an upcoming interview with the TODAY show, the 38-year-old new dad explained how he and wife Nancy Fallon kept the baby news under wraps.

"My wife and I had been trying a while to have a baby," Fallon told Savannah Guthrie, in a pre-taped interview airing next week. "We tried a bunch of things -- so we had a surrogate."

The couple, who wed in 2007, decided to keep the pregnancy a complete secret.

"We said, 'We're not going to tell anybody,'" Fallon explained. "It'd be just more fun if it's just private between me and my wife. And then we get to introduce her to everybody."

The first-time parents welcomed Winnie Rose at 6:21 a.m. on July 23.

Fallon isn't the only celebrity in Hollywood to welcome a child via surrogate. Click through the gallery to see more celebrities who used a surrogate.

• Elton John: Sir Elton John and David Furnish welcomed their second son Elijah on January 11, 2013. The doting daddies used the same surrogate mother for their 2-year-old son Zachary.

• Nicole Kidman: Nicole Kidman and Keith Urban used a gestational carrier for their second child, daughter Faith. “Having given birth and then being there to see my child born in that way, I felt so much love for our surrogate, gestational carrier,” Nicole said.

• Elizabeth Banks: What to Expect When You’re Expecting actress Elizabeth Banks and husband Max Handelman have welcomed both sons – Felix, nearly 2, and Magnus, 3 months – via surrogate mother.

• Neil Patrick Harris: How I Met Your Mother star Neil Patrick Harris and partner David Burtka are dads to twins Harper and Gideon.

• Ricky Martin: Ricky Martin welcomed his twin sons, Valetino and Matteo, via surrogate in August 2008.

• Chris Daughtry: American Idol star Chris Daughtry and wife Deanna welcomed fraternal twins Noah and Adalynn via gestational carrier in November 2010. The couple used a surrogate to carry their twins due to Deanna’s partial hysterectomy.

• Sarah Jessica Parker: Sarah Jessica Parker and Matthew Broderick welcomed son James Wilkie in October 2002. But the couple struggled to conceive again. The Sex and the City star spoke very highly of their gestational carrier, calling her “strong, bright, independent, thoughtful, caring, gracious and generous." The couple welcomed twins Tabitha and Loretta in June 2009.

• Giuliana Rancic: After a long road to parenthood, Bill and Giuliana Rancic welcomed son Duke in August 2012 via gestational carrier. After such a positive experience with their son‘s  gestational carrier, Delphine, they would consider her again.

• Marissa Jaret Winokur: Broadway actress of the famed musical Hairspray, Marissa Jaret Winokur underwent a hysterectomy at the age of 27 after being diagnosed with cervical cancer. Surrogacy was her last chance to become a mother. She welcomed son Zev Isaac Miller on July 22, 2008.

MORE: 10 Celebrities Who Used a Surrogate