James Corden can't hide his excitement over sister Ruth's meeting with Prince William and Kate

James Corden was overjoyed on Wednesday (Aug. 24) as he shared a photo of his sister Ruth meeting with the Duke and Duchess of Cambridge. The royals were on a visit to a charity Ruth works with, Youthscape in Luton, which specialises in young people's social, emotional and spiritual development.

TAP TO VIEW GALLERYRuth Corden with the Cambridges Ruth Corden with Prince William and Kate

Clearly overwhelmed with pride, the late night television host took to Twitter to share the special moment his younger sister met the royals. He wrote: "Check out my sister @Rudimuller here with some friends! So proud of the work she is doing."

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Alongside the sweet tribute, 38-year-old James shared an image of Ruth chatting to William and Kate about the various mental health projects the charity is involved with.

James Corden tweets being proud of her sister Ruth Ruth seemed to appreciate her brother's support

Meanwhile Ruth, who proudly posts about her charity work on her own social media page, appeared delighted at her brother's comments, and simply replied: "LOVE YOU!"

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Kensington Palace official Twitter also responded to James' touching tweet, and wrote: "@JKCorden It was great to meet her - a lovely woman doing incredible work."

Kensington Palace respond to James Corden's tweet Kensington Palace also responded to James' sweet tweet

During their visit, the royal couple were treated to a tour of the charity's new home, Bute Mills, which has recently been revamped.

William and Kate's visit to the charity was one of three engagements of the day in Luton. The Duke and Duchess also visited Keech Hospice Care, an organisation that helps adults and children with life-limiting conditions live pain and symptom free, spend time with their family and friends, and stay out of hospital.

Prince William and Kate Middleton in Luton It was William and Kate's first engagement since returning from their summer holidays

While there, Prince William opened up about missing his late mother Princess Diana while speaking to a young teenager who had also lost his mum.

"I know how you feel," William said, empathising with Ben Hines, 14, whose mother Alexandra passed away in June 2015. "I miss my mother every day. It's okay to feel sad."

Prince William at Youthscape The Duke and Duchess visited Youthscape to learn about the charity's work with young people

William advised Ben, the youngest of three brothers that met the royals, on how to deal with his loss. "As four boys, you have to talk a lot better, we're not good sharers. It's a classic example of lots of talking needed," he said.

"Time makes it easier. I know how you feel, I still miss my mother every day and it's 20 years after she died. The important thing is to talk about it as a family, it's okay to feel sad, it's okay for you to miss her."

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