Since neither have social media, their romance has never been confirmed nor denied. It's mainly hearsay and their chemistry in interviews with outlets such as Entertainment Weekly and some adorable photos Twitter got their hands on. However, according to Who's Dated Who, the couple are in fact official. They say the pair started dating during the filming of the third season of "Merlin" in 2010, and then got engaged six years later, in 2016. Despite being quite private, they never shied away from showing affection in their interviews. And fans have gone nuts for it.
Along with this pair, apparently Angel Coulby, who played Guinevere in "Merlin," and Bradley James, who played King Arthur, have also been together for nearly a decade now (via Who's Dated Who). So, basically, "Merlin" was also a matchmaking service by the sounds of it. And despite the two year age difference, McGrath and Morgan undeniably have great chemistry.
