By Kate Thomas for MailOnline
Published: 16:09 BST, 14 October 2019 | Updated: 16:11 BST, 14 October 2019
They've been linked since August when they were spotted on a theatre date in London's West End.
And Lily Allen confirmed she was officially dating David Harbour, 44, on Monday, by sharing a picture of The Stranger Things star's bulging biceps during his Saturday Night Live hosting gig, captioning the image 'Mine'.
The 34-year-old star's loved up social media posts came just one day after the unlikely duo were pictured kissing on the street in New York City.
It's official: Lily Allen, 34, confirmed she was dating David Harbour, 44, on Monday, by sharing a picture of The Stranger Things star and captioning it 'Mine'
Lily and David had been seen ogether a number of times over the last few weeks, including a date night at the Hughie Fury vs Alexander Povetkin boxing match at London's O2.
The Smile hitmaker now seems to have made things social media official, signalling they are exclusively dating.
She had supported David during his SNL hosting debut on Saturday night and was even spotted leaving the show alongside the actor's family.
The London-based star also hinted she was going to stay with David in America until the Brexit deadline of October 31 when the UK is due to leave the European Union.
Sharing a number of selfies of herself, the singer wrote: 'Leaving UK till after Brexit. Good Luck Kids. Also what’s the most annoying engagement baiting question