Ziering, 45, is best known for his work on TV's "Beverly Hills, 90210" and "Dancing with the Stars."
"Her name is Erin Kristine Ludwig," Ziering told People.com via an e-mail about his new fiancee. "She's a nurse. We're planning a spring wedding and we've been together since Labor Day 2009."
Ziering was previously married to model-actress Nikki Schieler from 1997 to 2002.