'Stranger Things' Fans Are Convinced David Harbour and Lily Allen Might Be Engaged or Married

Are David Harbour and Lily Allen planning on tying the knot?! Fans are entirely convinced the pair are either engaged or already married, after the singer flashed a massive diamond ring on Instagram.
Allen appears to be toying with fans about the potential big news. When one person asked whether her Stranger Things beau had popped the question or not, she gave a cheeky response. As reported by E! News, she wrote back, "First rule of engagement club....," referencing the famous line from Fight Club.
You can see the Brit Award winner's selfie featuring her massive diamond ring below.
So are they engaged? Well, in March, the singer's fans caught a potentially major slip-up on Instagram Live that may have revealed she had already married Harbour.
As JustJared reported (via E! News), when chatting about the sales of her last record, Allen said,"[5,000]. I'm serious. That's how bad things are these days. You think you married a pop star? You didn't," then adding, "Not that we're married. We're not married. I just want to make sure you know." Harbour then cut in, stating, "But she is my wife," to which Lily added, "Yes, we do pretend." Hm.
Married or engaged, or neither, these two are just the cutest. The pair went public with their romance last September, and Stranger Things fans have been watching their every move since. It looks like we'll have to just continue playing the guessing game regarding the next step in their relationship!