Josh Brolin and his assistant Kathryn Boyd are engaged and this giant rock confirms it!!
When the couple stepped out at the Cannes Film Festival on Tuesday, we all got a great glimpse of Kathryn's MASSIVE diamond ring.
Naturally, they couldn't stop smiling as they walked the red carpet!
[ Related: DWTS's Amy Purdy Is Engaged! ]
Kathryn subtly showed off her new bling against her red ruffled dress, and also showed off her man in a suave suit and bow-tie.
We're so happy for these two!
To see more pics of that rock on Kathryn's left hand, ch-ch-check out the gallery (above)!
[Image via Getty Images.]
Tags: cannes, film flickers, josh brolin, kathryn boyd, love line, put a ring on it, wedding waltz