On July 25, 2017, Magnussen took to his Twitter to share a picture of him kissing his girlfriend Fahy's neck. It was the first time the actor has featured his girlfriend in his post. The tweet also confirmed that the two actors were in a relationship.
A year later, on August 26, 2018, Fahy also shared a love-filled picture of the couple on Instagram, writing, "We went to tha beach."
Slowly and gradually, the couple started making regular appearances in public events and social media posts together. In one instance, they attended the Golden Globes After Party in The Beverly Hilton Hotel in Beverly Hills, California, in January 2020.
Even as of now, the two are still dating and being a part of one another's support. And, while their relationship blooms, fans’ speculations about Magnussen being gay might not be relevant, too.
Magnussen and Fahy had met each other for the first time on the set of the 2011 Hallmark movie The Lost Valentine. In the film, both of them had prominent roles, as the actor portrayed the character of Neil Thomas, whereas Fahy portrayed Young Caroline.