Hailee Steinfeld and Josh Allen are done rehearsing, and they're about to get married for real ... so check out Hailee's gown just before she walked down the aisle!
The actress was spotted minutes before she marched toward the altar dressed in the traditional all-white dress Saturday ... a long train coming off the back of her hair and dress.
The off-the-shoulder gown hugged Steinfeld's figure tightly ... and, she added elbow-length gloves to the ensemble, too.