HMS Victorious was the third Illustrious-class aircraft carrier after Illustrious and Formidable. Ordered under the 1936 Naval Programme, she was laid down at the Vickers-Armstrong shipyard at Newcastle upon Tyne in 1937 and launched two years later in 1939. Her commissioning was delayed until 1941 due to the greater need for escort vessels for service in the Battle of the Atlantic.

The Illustrious class was a class of aircraft carrier of the Royal Navy that included some of the most important British warships in the Second World War. They were laid down in the late 1930s as part of the rearmament of British forces in response to the emerging threats of Nazi Germany, Fascist Italy and Imperial Japan.