Veteran US film critic Roger Ebert is recovering in hospital following an emergency operation, his newspaper the Chicago Sun-Times has reported.
Ebert now co-hosts a movie review show with critic Richard Roeper
The operation was reportedly needed to counter complications arising from an earlier operation to remove a cancerous growth from his salivary gland.
"Roger is stable and responding well," his wife Chaz told the AP news agency.
Ebert, 64, is best known for his movie critic double act with fellow reviewer Gene Siskel, who died in 1999.
The pair famously used a "thumbs up" or "thumbs down" system to rate the films they saw.
"Roger and I are so grateful for your prayers and support," his wife continued.
"Please give the big guy the space and time needed to recover until he is ready to use those thumbs again."
Ebert has been the Chicago Sun-Times film critic since 1967. He won the Pulitzer Prize for criticism in 1975.
He has had four cancer surgeries, including one in 2002 to remove a malignant tumour from his thyroid gland.
"Roger has bravely and successfully fought health problems in the past," said the Sun-Times editor-in-chief, John Barron.
"We're confident he'll do the same now."