Married at First Sight dating coach Mel Schilling has died of cancer at the age of 54, her husband has said on Instagram.

Schilling, who was part of the reality TV show's cast since 2016, was diagnosed in December 2023 and said earlier this month that the disease had spread to her brain.

She "passed away peacefully today, surrounded by love", a statement from husband Gareth said on Tuesday.

"To most of you, she was Mel Schilling - matriarch of MAFS and queen of reality TV. To Maddie and me, she was our wee Melsie: an incredible mum, role model, and soulmate," he wrote.

He said she used "all of her remaining strength" in her final moments to whisper a message for daughter Maddie and him "that will sustain me for the rest of my life".