Hilary Duf1

With a walk down the aisle looming ahead, Hilary Duff was spotted keeping in tip-top shape with a gym visit in Los Angeles, California on Wednesday.

Wearing all-black workout gear, the “Cheaper By the Dozen” cutie also sported her new engagement bling as she walked to and from her Mercedes SUV before and after the personal trainer session.

As for the fancy diamond ring bestowed unto Hilary by fiance Mike Comrie, it’s said to be a million-dollar, 14-karat princess-cut sparkler.

Miss Duff agreed to her hockey star beau’s proposal during a recent vacation to the islands of Hawaii.