Gayheart, known for her work in Noxema commercials and Showtime's Dead Like Me, told In Touch Weekly that she and Dane have always wanted to be parents.
"I think Eric is going to be a wonderful dad, and hopefully I'll be a good mum. We're absolutely looking forward to it!" she said.
The 38-year-old and Grey's Anatomy star Dane were recently involved in a lawsuit with Gawker, stemming from a leaked tape that featured the couple in an intimate encounter with former beauty queen Kari Ann.