June 21 (UPI) -- Joseph Gordon-Levitt honored his 10 Things I Hate About You co-stars in a throwback post Thursday.
Ledger, who played Patrick Verona, died at age 28 in January 2008. Gordon-Levitt portrayed Cameron James in the film, which is based on the William Shakespeare play The Taming of the Shrew.
"I remember that day :) #tbt," Gordon-Levitt captioned the snapshot on Instagram.
Stiles, who portrayed Kat Stratford, previously said in an interview with Us Weekly that working with Gordon-Levitt and her co-stars was her favorite part of 10 Things I Hate About You.
"It was such a fun summer and such a pure experience of working on a movie where we were all -- this was our first big break," she said. "We were really open and invested and it was really fun being in Seattle."
Stiles said she keeps in touch with Gordon-Levitt and Oleynik, and remembered Ledger as an "amazing" person.
"Amazing, amazing he was so nice. He was such a force," she said. "He was ... even at that age a very, very powerful, lovely human being."
Gordon-Levitt will next star in the movie 7500.