Reality TV star Mel Schilling, best known as the dating coach on “Married at First Sight Australia,” has died following a battle with cancer. She was 54.

Schilling, who was diagnosed with colon cancer in December 2023, “passed away peacefully” on Tuesday, March 24, Schilling’s husband, Gareth Brisbane, revealed in an Instagram post. The couple shared one child, a daughter named Madison.

“To most of you, she was Mel Schilling — matriarch of [‘Married at First Sight’] and queen of reality-TV,” Brisbane wrote alongside several photos of Schilling. “To Maddie and me, she was our wee Melsie: an incredible mum, role model and soulmate.”

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Brisbane also paid tribute to Schilling’s resilience throughout her cancer journey, noting that despite the difficulties of chemotherapy, she “never complained and never stopped showing courage, grace, compassion and empathy, and never missed a day of filming.”

“Life can be beautiful, and life can be incredibly cruel. But ultimately, life is fleeting, fragile and tomorrow is promised to no one,” Brisbane wrote. “If you can do anything to honor Mel, please live life to the full, love your people well and try not to sweat the small stuff.”

Schilling joined “Married at First Sight Australia,” a series that follows several couples blindly paired by relationship experts for a trial marriage, for the show’s sixth season in 2019. She also appeared in two seasons of “Married at First Sight UK,” the series’ British counterpart.

In February, Schilling announced her departure from the reality show after a 12-seaosn run, due in part to her cancer battle.