Miley Cyrus reportedly has her wedding gown designer locked down - the actress/singer has been checking out Marchesa dress sketches.

The future Mrs. Liam Hemsworth has narrowed her pick down to two Marchesa designs, according to a business associate of the dressmaker.

She tells Life & Style magazine, "Miley recently looked at several wedding dress sketches by Marchesa. She asked for Marchesa's ideas and told her she wanted something original."

And the designer has a lot of pressure to deliver the perfect gown - in a recent interview, Cyrus said, "That moment when he (Liam) first gets to see me in my dress... has to be perfect."