The former high-ranking Scientology executive was battling esophageal cancer.

“Rest in peace, my sweet, beautiful husband,” she wrote.

Your courage, bravery, and integrity are unmatched and will forever inspire us.

Mike Rinder attends the Critics' Choice Real TV Awards on June 02, 2019 in Beverly Hills, California.

Mike Rinder.Credit:JC Olivera/WireImage

The world will remember you."

Her post also contained a final message from Rinder, which he provided to Collbran before his death.

If you are in any way fighting to end those abuses kindly keep the flag flying never give up.

TV Personality Mike Rinder Mike Rinder attends the 2018 Creative Arts Emmy Awards - Day 2 at the Microsoft Theater on September 9, 2018 in Los Angeles, California.

Mike Rinder.Paul Archuleta/FilmMagic

Rinder encouraged fans to contribute to his son’s college fund in lieu of sending flowers.

“Let the flowers grow and look to the future,” he concluded.

“With that said, I rest in peace.”

Mike Rinder and Leah Remini attend the 2019 Creative Arts Emmy Awards on September 14, 2019 in Los Angeles, California.

Mike Rinder and Leah Remini.JC Olivera/WireImage

Born in Adelaide, Australia, in 1955, Rinder was raised as a Scientologist from early childhood.

just keep Mike, Christie, and their two boys in your prayers.

Surround them with all the love and strength they so deserve."

Representatives for Remini did not immediately respond toEntertainment Weekly’s request for comment.

Rinder is survived by Collbran and their two sons, Shane and Jack.

He also shares two children daughter Taryn and son Benjamin with his first wife, Cathy.