Dakota Johnson and Chris Martin have reportedly gotten matching tattoos.

Dakota Johnson

Dakota Johnson

The 28-year-old actress and the Coldplay musician haven't made their relationship red carpet official just yet, but they did the next best thing recently as they were spotted with matching ink, proving their romance - which has been going on for around a year - is going strong.

Whilst at the 'Suspiria' photo call at the Venice Film Festival over the weekend, Dakota was seen to be sporting a delicate infinity sign crossed with two small Xs, which was barely visible on the back of her left forearm, just below her elbow.

Chris, 41, was similarly spotted at the launch of S.E.A Jeans in Los Angeles around the same time, with an identical tattoo on the inside of his right forearm.

The matching tattoos come after it was reported that 'Something Just Like This' hitmaker Chris - who has children Apple, 13, and Moses, 12, with ex-wife Gwyneth Paltrow - was "getting more serious" with the 'Fifty Shades of Grey' actress after getting to know her out of the spotlight.

A source said: "For the past two weeks, they have spent a lot of time together. Chris lives in Malibu and Dakota seems to love hanging out there. They occasionally go for dinner with friends, but mostly have friends over at home. They go to the beach together, and walks around the neighbourhood. They seem to enjoy sharing a quiet life. It does seem they are getting more serious."

Meanwhile, Dakota's father, Don Johnson, has previously given his support to the actress' romance with the singer, admitting he thought the 'Viva La Vida' hitmaker would be "good" for his daughter.

He said: "He's a lovely guy. I've met him and you want your kids happy, no matter what shape it takes.

"That's the goal, that's the key. He's a very talented and gifted musician. I've seen them in a concert at a small venue called the Troubadour in Los Angeles when they were first coming out and that was a memorable moment.

"I knew right then he'd be good for her. I said 'Oh you know, that man has got something going on'."