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

John Travolta has penned a moving tribute to his late son Jett on what would have been his 30th birthday.

The actor's eldest child with his late wife Kelly Preston died in 2009 after suffering a seizure while the family were on holiday in the Bahamas. Jett - who was 16 - had a history of having seizures.

Sharing a sweet black and white image of him and his son on Instagram, Travolta wrote: "My dearest Jetty, I miss you more than words can say.

Read more: John Travolta poses for selfies with fans at Norfolk supermarket

"I think about you everyday. Happy Birthday.

"Love, your Dad."

Speaking in 2014, the star said Jett's death was "the worst thing" that had ever happened in his life.

"The truth is, I didn't know if I was going to make it," he said in an interview on stage at a theatre in London.

"Life was no longer interesting to me, so it took a lot to get me better."

The actor also has son Benjamin, 11, and daughter Ella Bleu, 22, with Preston, who passed away in 2020 aged 57 following a private two-year battle with cancer.

Announcing his wife's death, the Grease star shared: "It is with a very heavy heart that I inform you that my beautiful wife Kelly has lost her two-year battle with breast cancer. She fought a courageous fight with the love and support of so many."

"Kelly’s love and life will always be remembered," he went on.

"I will be taking some time to be there for my children who have lost their mother, so forgive me in advance if you don’t hear from us for a while.

Read more: John Travolta marks release of Kelly Preston's final film

"But please know that I will feel your outpouring of love in the weeks and months ahead as we heal."

Watch: Pulp Fiction stars reunite at the Oscars