Prince Harry has said he cannot imagine life without son Archie - but confessed the baby kept him up last night.
The Duke of Sussex chatted about his baby during the first of a series of visits in Oxford which began with him celebrating the work of the city’s children’s hospital.
Harry, who became a father for the first time last week, was presented with a tiny teddy bear for Archie when he arrived at the hospital.
Daisy Wingrove, 13, a former patient of the hospital, presented the gift to the duke just before he began his tour of the hospital, and Harry let out a big sigh and said "Ahhh" as a nearby crowd of well-wishers made the same sound in sympathy.
Later the duke met parents whose children have been battling cancer on the hospital’s Kamran Jabble ward, named after a former patient.
Harry met Jay at the hospital who gave the duke a balloon toy, before saying: "This is for baby".
The duke joked afterwards that Archie would "probably pop" the balloon toy.
He chatted to mum-of-two Amy Scullard, from Aylesbury, whose son Emmett, aged three, is in remission after being diagnosed with testicular cancer when he was two.
She was holding her 10-week-old daughter Ida and immediately struck up a conversation about Harry’s newborn son.
Ms Scullard said: "Harry asked me if she was over the stormy period as babies are supposed to be grumpy for the first 10 weeks - and she is."
"He said he’s getting used to the baby and how Archie has fitted into family life.
"He said he just feels part of the family and he can’t imagine life without his son."
The duke also told another patient how Archie had kept him up last night.
Christine George, 52, whose son James, 17, is having chemotherapy, said: "He said he had all this organised, but had a sleepless night last night – not the ideal preparation for his first day at work."
Harry and Meghan’s son was born last Monday. Today was Harry’s first full day of work in the UK, following a trip to Amsterdam last week.