Wow! These two move quick!
At the Academy's Hollywood Costume luncheon on Wednesday, Miz Diaz was rocking a huge ring on THAT finger!
One eyewitness said Cameron was "casually and constantly twirling her ponytail, showing off the ring and often playing with it."
And another source said the couple went to eat with friends at Madeo restaurant in Beverly Hills later on, explaining: "They arrived together with Benji driving. Cameron showed off her new ring and was smiling. They enjoyed dinner for several hours."
If that all doesn't sound suspicious enough, it's reported that Benji may have moved into her home too!
When it's right, sometimes people just know it!
[Image via Getty Images.]