Joe Jonas and Sophie Turner spent Thanksgiving together.

Sophie Turner

Sophie Turner

The rumoured couple have reportedly been attached at the hip for the last couple of months and are said to have made their relationship official after spending the annual holiday with each other.

A source told Entertainment Tonight: "Sophie and Joe met through mutual friends. They have been dating for a couple of months. They spent Thanksgiving together in Mammoth Lake. They are really into each other and having a great time."

The pair were first romantically linked in early November, when they were spotted cosying up to one another at the MTV European Music Awards in Rotterdam, Netherlands.

And it won't be too much of a surprise that Joe's first encounter with Sophie was laid back as he previously revealed he likes dates to be low-key.

He explained: "I'd like it to be really low key. I think there's this thing that happens where, with a first date, there's just this immense amount of pressure on both sides that it just has to be kind of magical. But the whole purpose is to get to know somebody, get a vibe going and then, from there, you kind of decide, 'Alright, do we want to do this again?' It's like the first course. A nice low-key dinner, maybe a drink afterwards, and then that's perfect."

And Joe made the bold move of inviting Sophie to his friend's wedding in Malibu where they were joined by Joe's brother Nick.

Sharing some pictures of their entire table on Instagram, Nick wrote: "About last night table 5 madness... #rp @pariscarney (sic)."

Before dating Sophie, Joe was in a serious relationship with model Gigi Hadid, who is now dating former One Direction star Zayn Malik.