Prince William's hilarious response when asked for Prince Harry's number

Prince Harry is lucky to have a brother who knows when to act as wingman - and when not to! Prince William was approached by a mom while on an official visit to Luton on Wednesday (Aug. 24), who asked for his eligible younger brother's phone number to give to her daughter. Naturally, quick-witted William had a clever response.

Trish Cruse, and her daughter Olivia, 27, were both at Luton's Hayward Tyler factory this week to catch a glimpse of William and his wife, the Duchess of Cambridge, née Kate Middleton.

TAP TO VIEW GALLERYPrince William Prince William had the best response when he was asked for Harry's number

When Trish approached the royal to make her cheeky request, William burst out laughing, and told her, "Oh no! You don't want that!"

Prince Harry's phone number certainly is hot property – but not everyone is quick to make the most of it. Suicide Squad actress Margot Robbie recently revealed that she takes days – sometimes weeks – to text the British royal back.

"He's pretty quick on text actually," she told Extra of Harry. "Unlike me – I write back four days later, weeks later sometimes."

Prince William joking around with Prince Harry "Oh no! You don't want that!" he told mom Trish Cruse

William and Kate's visit to Luton was their first official engagement in a month, and they marked their return to royal duties by raising awareness about mental health.

The pair first visited the Youthscape charity, before arriving at Keech Hospice, where William opened up about missing his late mother Princess Diana.

The future king, who was 15 when Diana died, was speaking to a young teenager who had also lost his mom.

Prince William and Kate Middleton William and his wife Kate visited Luton on Wednesday

"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."

William also advised Ben, the youngest of three brothers, 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."

Before leaving the family the Prince said: "Promise me you will talk to each other." Thomas Hines, the 20-year-old brother to Ben, replied to William: "I promise, sir."

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