She's got legs for days and she's not afraid to show them.

Dakota Johnson sat opposite Jimmy Fallon on Monday night for an interview to promote her latest film Fifty Shades Free, set to premiere on February 9.

She wore an off the shoulder black Versace dress with multiple gold buttons on the bodice and a flirty slit on the side.

Legs for days: Dakota Johnson put her long legs on display while visiting The Tonight Show Starring Jimmy Fallon on Monday

Her wavy locks were loose and tousled to one side as she admitted to Jimmy that she fangirled over the young cast of Stranger Things at the Golden Globe Awards.

Johnson returns to the big screen for the third and final installment of the Fifty Shades franchise based on the bestselling novels by E.L. James.

The erotic romantic drama will see her character Anastasia marry boyfriend Christian Grey, although not everything is perfect as they will have to deal with the sins of their past.

Wedding bells: She talked about her upcoming film Fifty Shades Free where her character Anastasia will tie the knot with her boyfriend Christian Grey

So haute: Johnson wore a black Versace mini-dress for her appearance

Say what? On the show, she admitted to taking photos of the cast of Stranger Things at the Golden Globe Awards

Johnson has recently been in the news for her blossoming relationship with Coldplay's lead singer Chris Martin.

Even her famous father Don Johnson has reportedly met the British rocker and he's gone on record with his approval.

He told London's The Sun newspaper, 'He's a lovely guy. I've met him and you want your kids happy, no matter what shape it takes.'

Trailer fever: The duo debuted a new trailer for the film where Anastasia comes face-to-face with an adversary

'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.'

The pair have traveled overseas in the last few months including dates in France and Israel. Most recently they were seen getting cosy while on an outing in Malibu.

Her boys: Dakota's dad Don Johnson has met her new boyfriend Chris Martin and he approves!