Sources tell Grazia magazine via IANS that "their flirtation was one of the worst kept secrets on set."
"Nobody is surprised that they've been spending time together. They really enjoy each other's company," added the insider.
"While it's all quite casual at the moment, they are looking forward to spending more time with one another as they promote the film, especially as they are both single," the insider added of the actress' alleged new relationship with Skarsgard.
Notable deaths of 2014 [PHOTOS]
Teresa and Joe Giudice distant since sentencing