Housley proposed to Mowry last week in Italy, according to a source for E!.
The couple were engaged before, added the insider.
"They were engaged a few years ago, but broke it off. They have been dating on and off for the past year and now he has put a ring on her finger once again," they revealed.
Mowry's family, including former sitcom co-star Tia, reportedly don't get along very well with Housely.
"Her family is not crazy about him. Tia and Adam don't always get along, but the couple are happy together and giving it another try," the source continued.
The pair have not yet set a wedding date, but the insider said that they would most likely be married at Housley's family's vineyard in Napa, CA.