The alleged Florida high school mass murderer is being showered with fan mail in jail — including pictures of scantily clad women — as well as cash contributions to his commissary account, according to a report.

Teen girls, women and even men have sent the adoring missives to Nikolas Cruz at the Broward County Jail, where he is being held on charges of killing 17 people at Marjory Stoneman Douglas High School in Parkland, the South Florida Sun-Sentinel reported.

The ghoulish groupies also are joining Facebook communities to discuss ways to help Cruz avoid the death penalty, according to the paper, which obtained copies of some of the letters.

On March 15, a Texas teen sent a letter in an envelope adorned with happy faces and hearts.

“I’m 18-years-old. I’m a senior in high school. When I saw your picture on the television, something attracted me to you,” she wrote. “Your eyes are beautiful and the freckles on your face make you so handsome.”

She also described herself as white with big, brown eyes. “I’m really skinny and have 34C sized breasts,” she said, ending her letter with juvenile jokes about gummy bears and peanut butter.

In a letter sent six days after the Feb. 14 massacre to the jail’s post office box in Fort Lauderdale, a Texas woman wrote: “I reserve the right to care about you, Nikolas!”

Her greeting card features a furry bunny holding binoculars looking out at the ocean. The message inside reads, “Out of sight, but never out of mind.”

An 18-year-old New Yorker wrote him: “No one else is dealing w/your demons, meaning maybe defeating them could be the beginning of your meaning, friend. I know you could use a good friend right now. Hang in there and keep your head up.”

And a woman from Chicago sent Cruz nine suggestive pictures, including a shot of her cleavage, another one of her in a skimpy bikini sucking a Popsicle and a tight shot of her rear end as she bent over.

Cruz’s attorney Howard Finkelstein said the suspect has received “piles of letters.”

“In my 40 years as public defender, I’ve never seen this many letters to a defendant. Everyone now and then gets a few, but nothing like this,” he told the Sun-Sentinel.

Cruz, who is on suicide watch, has not seen any of the mail, Finkelstein said. He has requested a Bible, according to jail records, but it was denied because of the suicide watch, Finkelstein said.

“We read a few religious ones to him that extended wishes for his soul and to come to God,” Finkelstein said, “but we have not and will not read him the fan letters or share the photos of scantily clad teenage girls.”

Fans also apparently sent Cruz $800 for his commissary account, which is used to buy snacks, coffee and personal hygiene products, Finkelstein said.

On Facebook, the now-private “Nikolas Cruz – the First Victim” included a young woman’s request for photos for a collage to send to the killer.

“I want him to see how many people love and care for him and all the beautiful faces,” she wrote, according to the Sun-Sentinel.

The group described its mission as “in complete support of Nikolas Cruz. Whether or not he did this, he was completely failed. He deserved to get the help he needs and he deserves a fair trial.”

“I want you all to know that Nikolas knows about us and he had the biggest smile on his face when he was told that we all support him,” a female commenter wrote March 16.

Cruz “is a magnet for women who want to save him,” said California forensic psychiatrist Carole Lieberman, who wrote a book about groupies of incarcerated killers, “Bad Boys: Why We Love Them, How to Live with Them and When to Leave Them.”

“He looks like such a sad and lonely figure,” she said. “Women who become pen pals and groupies of killers in prison are those who have had a dysfunctional relationship with their dad that has made them feel unlovable.”

Finkelstein said he was concerned that “everyday boys and girls are starting to view him in an elevated way, looking up to his fame and notoriety.”

“The letters shake me up because they are written by regular, everyday teenage girls from across the nation,” he said. “That scares me. It’s perverted.”