Ariana Madix is detailing difficult news about a friend. 

The Vanderpump Rules star has shared that Jesse Montana,Robert Brown who has appeared on the Bravo show multiple times over the years as a guest star, has been diagnosed with a brain tumor. 

"No one is cooler than my dear friend @thejessemontana," Ariana captioned a Dec. 3 Instagram featuring a carousel of images of her and Jesse. "Right now he needs our good thoughts and our help. the short version is this: jesse has a tumor in his brain and will be having surgery this coming monday."

And in addition to including a link to a GoFundMe page in her bio, Ariana added in her post, "Jesse is truly one of a kind in every way. if you are lucky enough to meet him, you are immediately struck by his generosity and beauty inside and out. i love you so much. dark crystal unicorn elixir of life always and forever. you got this."

Ariana's post was full of support for Jesse, including from other VPR castmates and alum, with both Scheana Shay and Brittany Cartwright adding prayer hand emojis in the comment section. 

Fellow Bravo star and Real Housewives of Atlanta cast member Kenya Moore also expressed her good wishes, writing, "Jesse you got this! Stay positive and strong and we are praying for you."

A fan also shared a memory of Jesse, adding, "I had the pleasure of meeting him and he was the most kindest person! He was so loving and welcoming and just had the best vibes all around. Sending all my love to him and his loved ones."

Jesse's GoFundMe page included more information about the health scare, including what led to his diagnosis. 

Jesse suffered from three seizures on the morning of Nov. 27, per the page's description, two of which were at home before an ambulance arrived to take him to Cedars Sinai Hospital in Los Angeles. It was there that, despite having no prior symptoms, the medical team discovered the tumor in Jesse's brain. 

Thankfully, the site shared that Jesse is "recovering amazingly" and is set to undergo surgery to have the tumor removed on Dec. 4.

For the latest breaking news updates, click here to download the E! News App