Stiles shared a close-up photo of her hand intertwined with that of her now-fiancé in front of a beautiful beach sunset, but all of our attention was naturally focused on the gorgeous diamond ring on her finger!
"Best Christmas Ever!" Stiles captioned the pretty pic.
Julia Stiles is engaged -- see the beautiful ring!
UNITED STATES - JANUARY 18: Actress Julia Stiles is on hand at launch party for the movie 'Down to Earth' at the club Chaos. She's in the film. (Photo by Richard Corkery/NY Daily News Archive via Getty Images)
Julia Stiles sitting in class in a scene from the film '10 Things I Hate About You', 1999. (Photo by Buena Vista/Getty Images)
Heath Ledger and Julia Stiles at swing in a scene from the film '10 Things I Hate About You', 1999. (Photo by Buena Vista/Getty Images)
THE TONIGHT SHOW WITH JAY LENO -- Episode 1971 -- Pictured: (l-r) Actor Julia Stiles during an interview with host Jay Leno on January 2, 2001 -- (Photo by: Paul Drinkwater/NBC/NBCU Photo Bank via Getty Images)
NEW YORK, NY - NOVEMBER 16: Actors Julia Stiles (L) and Ben Foster (R) attend Urban Arts Partnership at the 15th annual The 24 Hour Plays On Broadway after party at BB King on November 16, 2015 in New York City. (Photo by Nicholas Hunt/Getty Images for Urban Arts Partnership)