Grease actor John Travolta has posted a heartbreaking message on what would have been his late son Jett's 27th birthday.

Jett Travolta died tragically in 2009 at the age of just 16, while on vacation with his family in the Bahamas. Jett, who had suffered from Kawasaki disease since the age of two, suffered a seizure and fell into the bathtub, at the Old Bahama Bay Hotel on Grand Bahama Island.

Taking to Instagram, the actor posted a picture of a painting a fan had made of his son, captioning the post: "'A painting a fan made of my son Jett! Happy birthday my son I love you!"

A number of the actor's fans were touched by the post and took to the comments to support Travolta. For instance, one person with the handle ivy_fitz_la1 wrote: "My son was born April 12th...we were in the room next door to you and your wife when Jett was born...Halifax hospital 1992...happy bday weekend...Alex & Jett?."

Meanwhile, someone else called hespenjodi added: "A beautiful soul in which is still thriving and happy and watching you from the other side! It's a gorgeous picture! Happy birthday jett!"

Travolta has credited his family and Scientology with helping him survive the death of his son, and in his memory, he created the Jett Travolta Foundation, a non-profit organization to help children with special needs. 

Grease actor John Travolta has posted a heartbreaking message on what would have been his late son Jett's 27th birthday.

Jett Travolta died tragically in 2009 at the age of just 16, while on vacation with his family in the Bahamas. Jett, who had suffered from Kawasaki disease since the age of two, suffered a seizure and fell into the bathtub, at the Old Bahama Bay Hotel on Grand Bahama Island.

Taking to Instagram, the actor posted a picture of a painting a fan had made of his son, captioning the post: "'A painting a fan made of my son Jett! Happy birthday my son I love you!"

A number of the actor's fans were touched by the post and took to the comments to support Travolta. For instance, one person with the handle ivy_fitz_la1 wrote: "My son was born April 12th...we were in the room next door to you and your wife when Jett was born...Halifax hospital 1992...happy bday weekend...Alex & Jett?."

Meanwhile, someone else called hespenjodi added: "A beautiful soul in which is still thriving and happy and watching you from the other side! It's a gorgeous picture! Happy birthday jett!"

Travolta has credited his family and Scientology with helping him survive the death of his son, and in his memory, he created the Jett Travolta Foundation, a non-profit organization to help children with special needs.