Did Shia LaBeouf propose to girlfriend Mia Goth?

Twenty-one-year-old model and actress Mia Goth was spotted wearing a huge diamond ring at LAX airport on Monday, and we're all left wanting an explanation or confirmation.

Goth has been wearing the sparkly jewel for more than a week now. She had the rock on her finger this weekend while spending time with LaBeouf in Los Angeles and was photographed at the Miu Miu show at Paris Fashion Week on Wednesday wearing it again, People reported.

The actors started dating in 2012 after he split from Karolyn Pho, his former girlfriend of two years, according to the New York Daily News.

LaBeouf and Goth co-starred in the "Nymphomaniac" films in 2013.

Goth prefers a low-maintenance relationship, and perhaps, Shia is her life-long guy.

"(I want) something very simple," she told i-D magazine back in 2012. "Maybe just stay in and cook and watch a great movie. I'm obsessed with film."

Wedding bells may be in Shia and Mia's future. LaBeouf's representative has yet to comment on the news.

"They seem very happy and spend a lot of time together. Shia is a big goof and Mia is the same way. They are usually just laughing and seem to have a great time," a source told People.