Rose Byrne and Bobby Cannavale may be making their trek down the aisle soon. The Neighbors 2 actress was spotted wearing a giant diamond sparkler on that finger while out in her native Australia last week. While it's not confirmed whether Bobby popped the question or if it's just a promise ring, the bauble appears to be a gold cushion-cut halo ring. Rose and Bobby have been dating since 2012, and earlier this February, the pair welcomed a son named Rocco. Bobby shared the exciting news during a stop on The Late Show With Stephen Colbert, telling the host, "I had a baby on Monday, yes . . . You know, I didn't do anything. We [men] don't do anything, and I'm so tired. I think I've gained 28 pounds since Monday. I mean, I'm not kidding you. Like, this jacket fit so well, like, last Thursday. But I've been eating so much."