Who co-wrote the screenplay for Groundhog Day with Harold Ramis?

Danny Rubin co-wrote the screenplay for Groundhog Day with Harold Ramis.

Rubin originated the film’s central idea and wrote the original screenplay in the early 1990s. His concept followed a cynical television weatherman trapped in a repeating February 2, allowing the story to explore boredom, personal change, and redemption through comedy.

Ramis became involved after receiving Rubin’s script and collaborated on revisions. He reshaped the darker, more philosophical premise into the 1993 fantasy romantic comedy starring Bill Murray as Phil Connors. The two writers differed over tone: Rubin emphasized the unusual and existential elements, while Ramis pushed the project toward a broader mainstream comedy.

The film was released by Columbia Pictures in February 1993 and became a major success. Rubin and Ramis later received the 1994 BAFTA Award for Best Original Screenplay. A common mix-up is crediting Murray, who starred in the film, or Ramis alone, even though Ramis was both co-writer and director.