Lily Allen & David Harbour Share Las Vegas Wedding Pics

Lily Allen and David Harbour did indeed get hitched in Las Vegas this weekend, and they did it right ... with an Elvis impersonator officiant and everything.

The couple tied the knot on Labor Day, according to their marriage certificate, and the singer-songwriter and the "Stranger Things" star shared a few pics of their ceremony from the Graceland Wedding Chapel. Classic!

The lovebirds look totally smitten and full of joy inside the chapel -- with Elvis singing away -- and outside on a Vegas street as Lily showed off her vintage white wedding dress and veil.

Apparently, a day full of love and marriage in Sin City works up your appetite ... Lily and the fam chowed down on some In-N-Out after the nuptials.

We broke the story ... David and Lily obtained a marriage license Sunday in Vegas, the first indication they were about to seal the deal.

Up until recently, they've been very private about being together -- with Lily revealing their engagement via a selfie back in May -- but they're letting it all out now.

David even pointed out that wildfires ravaging California and a pandemic affecting the whole world couldn't stop them from becoming husband and wife.