Lily Allen and David Harbour have obtained a marriage license to wed in Las Vegas.
According to TMZ, the pop star, 35, and the Stranger Things actor, 45, have registered to marry in Sin City with a license that is valid for 12 months.
Public records obtained by the publication state the expiration date for the license is September 6 2021 - meaning they will need to wed within a year.
Getting hitched? Lily Allen and David Harbour have obtained a marriage license to wed in Las Vegas
MailOnline has approached reps for the couple for comment.
This comes days after Lily was seen strolling through New York flashing a sparkling diamond ring - fueling the unconfirmed rumours she and David are engaged.
They were with her daughters Ethel, eight, and Marnie, seven, while taking a stroll through the city.
The quartet have been in New York of late - with the sudden license application hinting that the next stop on their jaunt could be Vegas.
To actually get married, the certificate has to come through - and this has yet to be issued.
Although TMZ have suggested they could tie the knot without it, and file it afterwards to make it official.
When seen last week, Lily lowered her protective face mask to sip an iced drink, flashing the sparkling jewellery as she did.
This was not the first time she had been seen wearing the ring; the Hard Out Here songstress debuted it last year, on her ring finger.
London-born Lily had shared snaps from the family's break in Croatia, as they prepared for their vacation to come to an end on Saturday.
Bride-to-be? The singer, 35, was spotted sporting a dazzling diamond ring on her ring finger
Smooth moves: As well as uploading a snap the happy group aboard their boat, the Smile singer also shared a heartwarming clip of her 45-year-old beau dancing with little Marnie
As well as uploading a snap the happy group aboard their boat, the singer also shared a heartwarming clip of her beau dancing with little Marnie.
In the video, the actor is seen holding the youngster in dance pose as he rocks with her to and fro while Bruno Mars' Uptown Funk plays in the background.
Wearing a yellow playsuit and red-and-white baseball cap, Marnie stands elevated on a chair on the boat to meet the actor's height as she gets into the spirit of things.
As her elder sister loudly giggles away in the background, Marnie adjusts her headgear before asking her famous mother if she's filming her.
Shaking a leg: In the video, the Stranger Things star is seen holding the youngster in dance pose as he rocks with