Scott Baio said on Facebook that his wife Renee was diagnosed with a brain tumor.
The Happy Days star, 54, took to the social networking site to write of his wife of seven years: "Although 90% of these type of tumors are benign they can cause serious problems depending on the size of the tumor and the location. We are waiting to learn the exact location to see if its operable.
"Renee has been down some rough roads in her life, yet each time with her strong faith in God, she comes through a better and stronger person."
After asking fans for their "prayers and support, Baio hailed his spouse as his "rock," noting that "she refuses to even shed one tear, nor will she question God's will."
The actor said that he, his wife and their 7-year-old daughter Bailey DeLuca "will get through this and along the way maybe help educate others to get checked out ... as 6500 people each year, mostly women get these tumors."
After an outpouring of support from fans on social media, the Charles-in-Charge star shared a message from his wife, saying "Thanks 4 the well wishes. A meningioma brain tumor is just a small bump in the road compared to the trials & tribulations my spec needs kids live."