'Modern Family' Star Ariel Winter -- Kylie Who? (PHOTO)

Ariel Winter took her boyfriend out to a wedding this weekend, and her fashion sense was on full display.

17-year-old Ariel sported a very low cut lavender bandage dress, while her adult BF (he's 18) went simple suit and tie.

The "Modern Family" star's 18th birthday is just a few months away.

Kylie Jenner and Bella Thorne might have some really neat ideas for Ariel on how to celebrate the big day when it's finally time -- on January 28, 2016.