James Middleton is confident his older sister is getting the best care. The 37-year-old gave an update on Kate Middleton 's cancer journey, saying that she's doing "OK" since completing her chemotherapy treatment earlier this month. "It's not for me to share on her behalf on how everything is going," James said during a Sept.

26 appearance on Today , " but she's getting all the right support and focus that she needs." And while Kate—who announced her cancer diagnosis in March— is certainly on the mend, he emphasized that her battle wasn't over just yet. As James put it, "Like anything, it takes time to process.

" Of course, James' support of Kate's wellness goes both ways. In fact, the entrepreneur revealed that his sister and brother-in-law Prince William have been crucial resources for him in the past, when he's struggled with clinical depression. "Catherine and William had both been involved in mental health charities and works of which I got help from," James explained.

"So, they were a fantastic bridge for the family for me to be able to translate how I was feeling." This isn't the first time James—who shares a 11-month-old son with wife Alizee Thevenet —has spoken out about Kate's cancer treatment. Back in March, the Meet Ella: The Dog Who Saved My Life author offered a heartwarming message for his sibling following her diagnosis announcement.

"Over the years, we have climbed many mountains together," James wrote on Instagram at the time. "As a family, we will cl.