In October, when asked in an interview if she had a "boyfriend on the scene", she answered, "I'd rather navigate this on my own. It's nicer to feel like I'm taking care of me."
Her representatives have been contacted for comment.
Corrin is starring in upcoming queer drama My Policeman opposite Harry Styles.
The film, adapted from Bethan Roberts' 2012 novel and set in the 1950s, features a character named Marion (Corrin) who falls in love with her best friend's older brother's mate Tom (Styles).
The couple marry, but Tom is secretly having an affair with museum curator Patrick (David Dawson).