Vincent Piazza is wary of talking about his "wonderful" girlfriend Ashlee Simpson as he's worried it will "diminish" their relationship.
The stars sparked rumours of a romance in June (11) after they were snapped kissing and walking arm-in-arm in New York City.
They seemingly confirmed the relationship by attending the second season premiere of Piazza's show Boardwalk Empire together last month (Sep11), and now the actor has addressed his union with Simpson.
He tells Okmagazine.com, "Saying it publicly (my feelings) would only diminish it between the two of us. She's a wonderful girl."
Simpson filed for divorce from her husband, Fall Out Boy rocker Pete Wentz, in February (11).