Gabrielle Union Remembers Heath Ledger With Epic '10 Things I Hate About You' Throwback Pic

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Gabrielle Union took a heartfelt trip down memory lane.

On Throwback Thursday, the 44-year-old actress shared a photo on  Instagram from the 1999 teen comedy, 10 Things I Hate About You. In the image, Union is posing with her co-stars Julia Stiles, Joseph Gordon-Levitt, Larisa Oleynik, Andrew Keegan, David Krumholtz and the late Heath Ledger.

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"Just a bunch of kids having the time of our lives up in Tacoma/Seattle," she gushed. "First movie and an experience that I'll never forget."

Union also praised her co-stars in the caption and paid tribute to Ledger, who died in January 2008. "The best/coolest/most generous group of people to share my 1st film experience," she continued. "What a time, man. ❤ and eternal light #RIPHeath #10thingsihateaboutyou #CanYouEverJustBeWhelmed."

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After portraying Chastity Church in 10 Things I Hate About You, Union went on to star in two other epic teen flicks, She's All That and Bring It On. Here's an exclusive look at when ET chatted with the stars of Bring It On in 2000 about the "cheer-ocracy":

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