Cher parts ways with costume designer Bob Mackie after four decades

The 67-year-old singer took to Twitter Thursday to tell fans that their split has ‘broken her heart.’

Cher is broken hearted and battle scarred!

The 67-year-old old singer revealed via Twitter Thursday that she has professionally parted ways with longtime costume designer Bob Mackie as he cannot work on her upcoming "Dressed to Kill" tour.

"Telling you something that has broken my heart, the man who made all my costumes since 1972 decided he couldn't do my last tour," she wrote.

JULIAN WASSER/GETTY IMAGES

Cher rocking one of her infamous costumes designed by Bob Mackie at the Academy Awards in March 1986 in Los Angeles, Calif.

It doesn't seem like the duo split on the best of terms.

"No matter how disappointed any of u are, you don't know my grief," Cher continued.

RON GALELLA/WIREIMAGE

'The man who made all my costumes since 1972 decided he couldn't do my last tour,' Cher wrote about Mackie via Twitter Thursday.

"I'm sure Bob can't know how much I miss him. Felt I had to tell u I'm crying."

It appears Mackie, 73, was unable to take on Cher's tour because of scheduling conflicts.

TIM MOSENFELDER/GETTY IMAGES

Cher seen here performing in 1999. The singer said her split with costume designer Bob Mackie has 'broken her heart.'

"I tried to convince him to end with me, but he had many reasons as 2 why he couldn't do it. 2 many obligations not enough time even 2 do 1."

Mackie is the mastermind behind some of Cher's most iconic and elaborate costumes during her performances over the last four decades.

Despite Cher's deep sadness over Mackie's exit, she did confirm she snagged a "talented and brave" new designer for "Dressed to Kill," which kicks off on March 22.

"Thank god I have a lovely man & wonderful designer!! Hugh Durant," she said.

"We will persevere," she added.