They're one step closer to making some pretty little liars of their own!
The couple, who met while working on a play together in 2009, have been together for three years.
Bellisario, 28, has starred as intelligent and competitive Spencer Hastings on the ABC Family hit for the past five seasons. Adams, 32, is best known for playing the deceitful Mike on USA's legal drama, which is currently in its third season. He will also appear in the second season of BBC America's sci-fi thriller Orphan Black and NBC's upcoming Rosemary's Baby miniseries.