Jon Gosselin Introduces Latest Girlfriend, 23, to Kids

 INFphoto.com

The latest milestone for Jon and Kate Gosselin's eight kids? Meeting their dad's new girlfriend.

On Saturday, Jon Gosselin hit a playground in Wyomissing, Penn. with his 9-year-old twin daughters Mady and Cara and 6-year-old sextuplets Alexis, Hannah, Aaden, Collin, Leah and Joel. Joining the kids as they played on the swings and monkey bars: Ellen Ross, 23, his girlfriend of one month.

"She is the first love interest to be introduced to his children," a source close to Jon, 33, tells Us of Ross, who lives in nearby Harrisburg, Penn. Gosselin recently moved into a one-bedroom apartment in Reading, Penn., to be closer to the Wernersville, Penn. house the kids share with his ex-wife Kate.

Although the kids were "confused" meeting Ross a few days earlier, a source says the famous kids "really taken to Ellen and she's enjoying spending time with them."

Back in March, the reality dad (whose prior ex-girlfriends include Hailey Glassman and Deanna Hummel) was dumped by Morgan Christie, his 25-year-old girlfriend, after less than two months. He was subsequently linked to a wealthy "fortysomething" woman from Washington, D.C.

Sign up now for the Us Weekly newsletter to get breaking celebrity news, hot pics and more delivered straight to your inbox!

Want stories like these delivered straight to your phone? Download the Us Weekly iPhone app now!