Dianne Holechek — Chuck Norris‘ high school sweetheart to whom he was married for several decades — has died … TMZ has learned.

We spoke with Dianne and Chuck’s son, Mike Norris, who tells TMZ … Dianne passed away peacefully at her home in Texas after a long battle with dementia.

Mike says, “We are thankful she is no longer suffering. She was the best, the greatest mom. We were so lucky to have her.”

Dianne stood by his side during his meteoric rise to fame as a martial arts champion and action star during the 1970s and 1980s … though they eventually separated in 1988 and divorced the following year.

Dianne was 84.

Jillian Lauren Shriner — soon-to-be ex-wife of Weezer bassist Scott Shriner — is breaking her silence for the first time since she was arrested for allegedly pointing and firing a gun at officers who were looking for a suspect near her Eagle Rock, California home.

As we reported back in April, Jillian was arrested on suspicion of attempted murder of a peace officer, but was later charged with assault and negligent discharge of a firearm. She’s now speaking out about the incident in an interview with Rolling Stone, saying … “I was doing the best I knew to protect my family.”

Jillian explains there are limits to what she can share about the case, but reveals she has entered a two-year mental health diversion program that is expected to result in her charges being dismissed … however, the case is still officially open for now.

She had shots returned to her during the standoff, striking her in the arm. She was charged with two felonies.

In regard to Jillian’s mental health, she gets vulnerable with the outlet, sharing … “My PTSD is a very real thing. I’m a victim of sex trafficking and domestic violence.” And, she says she doesn’t mind the headlines mentioning “Mental Health Diversion,’’ explaining she’s open to discussing it and she feels she is in a position to speak about the topic.

However, the headlines that really got to her the most were about her relationship with Scott. She notes … “The headlines about the divorce were the ones that really hurt me. I was the one who served my husband, but still, to see it in the public was really painful.”

She’s currently in the process of divorcing Scott over “irreconcilable differences” and told RS they had grown apart over the years, adding that her trouble with the law served as a “crisis” point. She says their date of separation is TBD.

Ethan Slater and Ariana Grande are proving the naysayers wrong, ’cause Ethan was making himself comfy in Ari’s ‘SNL’ green room as she hosted Saturday night’s show!

Ari’s former Nickelodeon co-star and bestie — Liz Gillies — posted a series of pics backstage at the ‘SNL’ taping … and in one, Ethan is seen sitting alongside Liz on the couch — showing ongoing breakup rumors are a bunch of BS.

Fans have been a bit skeptical lately about where the ‘Wicked’ stars’ relationship lies. Ethan was recently asked about working alongside his girlfriend, and his answer raised fans’ eyebrows when he pivoted to talking about the cast as a whole — sounding the alarm that the two might be over ‘For Good.’

Since the split rumors began for the couple — rumors we were told were untrue, BTW — eagle-eyed fans have been on high alert for any sign that the two are donezo. But with this recent photo dump, the speculation proves to be just that.