What? The actress was spotted in Dublin last night wearing a low-key, jumper and jeans ensemble, but wait a minute, what's that sparkler on her wedding ring finger? Could she be engaged to her fellow-actor beau, Sebastian Knapp?
Where? The opening night of Steel Magnolias, Harry's Bar, Dublin, 12 September
Verdict?Engagement ring or not, this is a very pretty ring. We'll keep you posted if congratulations are in order!
Let us know what you think of Mischa's latest look and see more celebrity bling in our gallery below:
Hear more about Mischa's fashion project below: