06/06/2012 AT 02:15 PM EDT
Queen Elizabeth paid a 50-minute call on her ailing husband, Prince Philip, Duke of Edinburgh, on Wednesday, at London's King Edward VII Hospital.
Arriving shortly after 5 p.m., the Queen, 86, smiled broadly for photographers as she climbed into the royal Bentley following her visit, reports the Telegraph
On Monday, Philip, who will turn 91 on Sunday, was rushed to the hospital from Windsor and diagnosed with a bladder infection
Despite his condition – and his having missed the final two days of the Queen's Diamond Jubilee
festivities – Philip was said to be in "good spirits" and responding to antibiotics, having "improved considerably" since his admittance, according to a statement from Buckingham Palace on Wednesday.
He is still expected to remain hospitalized for his birthday.
The couple's younger son, Prince Andrew, the Duke of York, 52, also visited with his father, having arrived at the hospital in his Range Rover, said the newspaper. Youngest son Prince Edward, 48, visited his father on Tuesday
and said he was "feeling a lot better."