Janet Jackson says film director Tyler Perry was a major source of support when her brother Michael died unexpectedly last June — repeatedly checking on her and even halting work on the movie they were making together, people.com reports.

“He actually stopped production and was there for me,” Jackson, 43, told People on Monday at the New York premiere of Perry’s new film, Why Did I Get Married Too? “(He was) constantly calling me, making sure I was OK, making sure that there wasn’t anything that I needed or my family needed.”

He is “such a sweetheart,” she added, “so giving and so loving.”