Ryan De Nino, who appeared on Season 2 of Married at First Sight, has died. He was 40.

On Tuesday, Ryan’s sister Melissa remembered his “huge heart” as she announced that he had died with a heartfelt tribute. A cause of death was not immediately known.

“Ryan was so damn funny and witty. He was fiercely loyal to those he loved. He had a huge heart, always,” wrote Melissa on Facebook. “I can’t explain what it’s like to lose a sibling. Someone who’s been there from the beginning and shares the same memories. No matter what we were going through, I loved him immensely. Life as I know it will never be the same.”

In 2015, businessman Ryan De Nino appeared on Season 2 of the FYI reality series Married at First Sight, in which he was matched with receptionist Jessica Castro.

After the couple married upon their first meeting at the altar, they decided to stay together on Decision Day, but they ultimately got divorced.