Kris Jenner reveals where Rob Kardashian spent Thanksgiving: 'He's working on himself'

Kris Jenner is opening up about where Rob Kardashian spent Thanksgiving.

The reality mom appeared on Maria Menounos' Sirius XM radio show, Conversations With Maria, where she revealed that her somewhat reclusive son was not with his family for part of the holiday last week.

"He lives with Khloe," Kris noted, since her daughter hosted dinner this year. "So he was around, and then went over to a buddy's house."

WATCH: Khloe Kardashian Hosts Lavish Thanksgiving Dinner Surrounded by 'Blended' Family

Rob was noticeably absent from Kylie Jenner's Thanksgiving family photo featuring Tyga and Scott Disick, which she captioned, "Thankful for my blended family."

Kris did reveal that Rob, who has struggled with depression and weight issues for the past two years, appears to be doing better.

WATCH: Khloe Kardashian Says Rob Kardashian Is 'Wasting His Life'

"He's doing alright, he's doing his best," she admitted. "He's working on himself. He's gonna be OK."

"He's not as into being on camera as the rest of us," Kris pointed out.

WATCH: Rob Kardashian Shares Heartfelt Photo of Lamar Odom, Is 'Praying Nonstop'

Khloe has been acting as a sort of mentor for Rob, 28, as he stays in her Calabasas, California home. In October, the 31-year-old worried that her younger brother is "wasting his life."

"Rob is such a great guy," Khloe told People at the time. "He's charming, charismatic, everything. That's what's so infuriating. I'm like, 'Where is your will to live life? Let's be around people!'"

WATCH: Rob Kardashian Appears Thinner in First New Selfie Shared in Years

"It's sad, because he's only wasting his life more and more," she added. "But he has to figure it out for himself. And he has so many people who want to help him."

See photos of Kardashian through the years: