Country star Alan Jackson and his family are in mourning this weekend following the death of his son-in-law Ben Selecman.

Selecman died aged only 28 after a freak accident on a boating dock in Jupiter, Florida.

He had been helping a woman on the dock when he slipped and suffered traumatic head injuries on Wednesday and died after being rushed to hospital.

Selecman, who was the Assistant District Attorney for Davidson County in Tennessee, was married to Jackson's daughter Mattie.

The couple only got married in October of last year during a stunning ceremony in Franklin, Tennessee.

"He pursued me until I finally saw the handsome, outgoing, Godly guy I needed. After deciding we were meant for forever, he took me on a picnic on the Old Historic Natchez Trace, where we enjoyed incredible wine, cheese, dancing and the most romantic proposal," Mattie also told Southern Bride.

The Office of the District Attorney General of Nashville Davidson County honored him on their Facebook page writing, "Assistant District Attorney Samuel Benton 'Ben' Selecman 1990-2018."