Ariel Winter Straddles Giant 'A' Sign in a Revealing Black One-Piece -- See the Booty-Baring Photo

The 'Modern Family' star is really putting the back in 'throwback Thursday.'

Ariel Winter is really emphasizing the "back" for her latest throwback Thursday post.

The Modern Family star got her #tbt on by sharing a booty-baring picture video to Instagram, rocking a revealing black one-piece swimsuit while straddling a giant red "A" letter sign in Los Angeles.

WATCH: Ariel Winter Celebrates Her 4-Month Anniversary With Levi Meaden in China

"#tbt to summer and long hair ?️➕?️," the 19-year-old actress captioned the photo.

Seems like she's got quite a view of the city... if a little obstructed.

WATCH: Ariel Winter Shares Racy Thong Bikini Throwback Pic for Valentine’s Day

Meanwhile, the body positive advocate recently celebrated four months of dating boyfriend Levi Meaden with a trip abroad!

Watch the video below for more!