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John Travolta honored his late son Jett in a touching Instagram tribute posted to his account on Wednesday.

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The actor shared a black-and-white throwback photo showing Travolta smiling with young Jett in front of him.

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My dearest Jetty, I miss you more than words can say. I think about you everyday. Happy Birthday. Love, your Dad, Travolta captioned Insta

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Travolta shared Jett with his late wife Kelly Preston

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In 2009, he and Preston’s 16-year-old son died while on a family vacation to the Bahamas

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Wednesday would have been Jett's 30th birthday.

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 Jett, Travolta and Preston also welcomed daughter Ella, now 22, and son Ben, now 11.

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Ella commented on the actor's tribute to Jett, writing, "Happy Birthday Jetty, we love you so much." 

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Ella turned 22 in early April and Travolta took to social media to show the two celebrating in England