The couple originally dated nearly eight years ago but reunited recently, Us Weekly claims.
They have reportedly now been together for around four months.
"They are really happy together!" a source claimed, adding that Ghanizada has been travelling to Vancouver to see Davis on the set of his new show Cult.
Davis, who will play a blogger searching for his brother in Cult - was previously married to Leelee Sobieski but the couple filed for divorce two months after their wedding.
Meanwhile, Ghanizada recently admitted that she would love to star as Princess Jasmine in Once Upon A Time.