It was rumored that Shia LaBeouf [1] recently popped the question to his longtime girlfriend [2], Mia Goth, and now the world is getting the best kind of proof! The actress was spotted running errands in LA on Thursday with a gorgeous sparkler on her left ring finger. Mia, who kept things casual in workout gear and sneakers, reportedly told a cashier at a grocery store earlier this month that she and Shia are set to tie the knot. Shia was also overheard referring to Mia as his fiancée during his recent elevator art experiment in London [3]. The couple has been dating on and off ever since they met on the set of Nymphomaniac in 2012. Keep reading to see more of Mia's ring, then check out even more celebrity couples we can't wait to see get married [4].