John Travolta pays tribute to late son Jett on what would have been his 30th birthday

John Travolta remembered his late son, Jett, on what would've been his 30th birthday Thursday. Jett died in 2009 at 16 years old after having a seizure and hitting his head in a bathtub.

"My dearest Jetty, I miss you more than words can say. I think about you everyday. Happy Birthday. Love, your Dad," Travolta, 68, wrote on Instagram, sharing a black-and-white photo of himself and Jett. 

The family was on vacation in the Bahamas when Jett suffered a seizure and died shortly after.