Khloe Kardashian updated fans on Rob Kardashian over the weekend.

The 30-year-old reality star spoke about her 28-year-old brother with Wonderwall while hosting an event at 1 OAK. Rob Kardashian has grown increasingly reclusive in recent months, and Kardashian admitted her sibling is not at his best.

"I just feel, especially over the last year, Rob has become very introverted and has a kind of social anxiety," she related. "He's definitely not at his happiest place that he once was, and I know he can get to that happy place and he will."

"We all kind of get to place where you don't know where to go in life or whatever, so I think it's important for him to know that he always has people to lean on and it's not unnatural for people to not know even where to begin," she added.

"It's a growing process. I will always be his No. 1 supporter."

Rob Kardashian appeared to retreat from public life as his weight increased, although Kardashian did not offer an explanation for her brother's behavior.

He infrequently uses social media, but made headlines Sunday for comparing sister Kim Kardashian to "Gone Girl" villain Amy Dunne on Instagram.