Jamie Foxx

TMZ first reported the public sighting.

The gossip site obtained video recorded sometime on Sunday afternoon (local time) showing Foxx waving from a mega-boat cruising on the Chicago River. He was seen waving to a passing vessel that gave him a cheer.

The star’s family members have been visiting him as he continues to rehabilitate in Chicago.

Foxx was hospitalised for several weeks after suffering a medical issue while in Georgia filming a movie for Netflix.

The reason for Foxx’s hospitalisation has not been released.

The 55-year-old actor, who had been in Georgia to film Back in Action, was taken to hospital last week after suffering a medical issue, but he is starting to recover.

A source told PEOPLE: "He's OK, thank God. He's still in the hospital, and doctors are running tests, but he's awake and alert. They're keeping him under observation."

And recently, his friend Martin Lawrence said Jamie is "doing better" in hospital.

The 55-year-old actor was hospitalised following an incident yesterday, and his daughter has thanked fans for their "prayers" and asked for "privacy" at this time.

Corinne Foxx, 29, wrote on Instagram: "We wanted to share that my father, Jamie Foxx, experienced a medical complication yesterday.

"Luckily, due to quick action and great care, he is already on his way to recovery.

"We know how beloved he is and appreciate your prayers. The family asks for privacy during this time. Much love, The Foxx Family."

Actor and musician Foxx teased the announcement on social media, releasing a phone call between himself and Diaz.

It comes eight years after the pair appeared together in what became Diaz's last film - a 2014 remake of Annie, in which she played Miss Hannigan.

Diaz, 49, said she was "so anxious" but "excited" about returning.

During the same phone call, Foxx, who won an Oscar for his 2004 portrayal of US soul singer Ray Charles, connected Diaz with the Super Bowl-winning Tom Brady in order to offer some advice about launching a big-time comeback.