The 19-year-old actress, who can currently be seen in Netflix series The "Chilling Adventures of Sabrina", and the 20-year-old were spotted leaving the Chateau Marmont in West Hollywood arm in arm on Wednesday night, March 20.
The new romance comes four months after Kiernan insisted she was too busy to date.
"I'll wrap on Saturday at 6am, so I'm pretty much useless on Saturday," she told Seventeen magazine about her punishing Sabrina schedule. "And then Sunday, I have to get all my stuff done for Monday. Occasionally, the cast can drive me out for a fun time but work is my number one priority right now."
Shipka is currently gearing up for the second season of her hit Netflix show.