Mary-Kate Olsen Sports Ring on Left Ring Finger!

Mary-Kate Olsen sports a ring on her left ring finger while stepping out of her apartment on Friday (December 13) in New York City.

The 27-year-old fashion designer was on her way to an office building.

PHOTOS: Check out the latest pics of Mary-Kate Olsen

Earlier in the week, Mary-Kate‘s twin sister Ashley was camera shy while out and about in the Big Apple.

“[Mary-Kate]‘d like to get pregnant but isn’t so sure about marriage,” an insider recently shared to Us Weekly.

Also pictured: Ashley donning a black ensemble while arriving for a departing flight at LAX Airport on Saturday (December 7) in Los Angeles.

15+ pictures inside of Mary-Kate Olsen sporting a ring on her left ring finger…