The Duke of Cambridge spoke about his children to patients as he visited a hospital.
William toured the Urgent Care and Trauma Centre at Aintree University Hospital in Liverpool at the start of a day of engagements in Merseyside.
He told elderly patients in the hospital's frailty assessment unit about his son Prince George starting school.
Speaking to Teresa Jones, 87, he said:
He told Edna Dagnall, 75:
Speaking to patient Pagan Tordengrav, 55, in the emergency department he said the Duchess of Cambridge, who is expecting the couple's third child, was doing very well.
Speaking about daughter Charlotte, he said:
Ms Tordengrav, who has stage four cancer, told William she was a fan of rock bands Led Zeppelin and Black Sabbath.
He said he preferred soft rock and told her:
Ms Tordengrav told William he was the "prince of hearts".
William said he felt "nostalgic" after seeing an air ambulance parked on the hospital's helipad.
Speaking to A and E volunteer John Geddes he said:
Before leaving the hospital he was taken to see the helicopter and spoke to members of the crew.
The new unit opened in January after a £35 million redevelopment and includes a charity-funded air ambulance helicopter landing pad.
William is also due to meet staff and service users at the Life Rooms in Walton, a community hub run by mental health trust Mersey Care.
The centre offers group and one-to-one advice sessions on finances, addiction, and employment and offers a space for groups to meet.
He will then visit Guinea Gap Leisure Centre in Wallasey, Wirral, where he is set to meet divers from the Merseyside Sub-Aqua Club and watch children showcasing Swim England's Learn to Swim programme, before viewing a water polo session.