Dennis the Menace
Dennis the Menace may refer to either of two comic strip characters that both appeared in March 1951, one in the UK and one in the US.

American character
 Dennis the Menace (U.S. comics), a daily US syndicated newspaper comic strip since March 12, 1951
Various television and film adaptations of the comic strip:
Dennis the Menace (1959 TV series), a CBS network live action television show 
Dennis the Menace (1986 TV series), an animated TV series
All-New Dennis the Menace, a 1993 animated television series
Dennis the Menace (1993 film), a live-action film released in 1993
Dennis the Menace (video game), based on the 1993 film
Dennis the Menace Strikes Again, a 1998 direct-to-video sequel of the 1993 film

British character
 Dennis the Menace is the original title of a British comic strip, written and published in Dundee, which first appeared in The Beano on 12 March 1951 and became the longest-running strip in the magazine in 2004;
Various television adaptations of the comic strip:
Dennis the Menace and Gnasher (1996 TV series) is an animated television series based on the Beano comic strip, known internationally as Dennis and Gnasher.
Dennis the Menace and Gnasher (2009 TV series) was released on September 7, 2009.
Dennis & Gnasher: Unleashed! (2017 TV series) is the latest animated CGI series, first broadcast in November 2017.

See also
 "Tennis the Menace", a 2001 episode of The Simpsons