Tributes are being paid to American writer and former president of Marvel Comics Stan Lee, who has died at the age of 95.
Lee created The Fantastic Four for Marvel Comics in 1961 and went on to create titles including Spider-Man, Thor and The Incredible Hulk.
Actor Chris Evans, best known for playing Marvel's Captain America, wrote "there will never be another Stan Lee".
X-Men star Hugh Jackman said "we've lost a creative genius."
Robert Downey Jr, who played Iron Man, simply wrote: "I owe it all to you, Rest in Peace Stan."
The legendary comic book author died at Cedars Sinai Medical Center in Los Angeles on Monday.