Lennon is probably best known for his role as Jim Dangle in the show Reno: 911!, but he is also a very successful screenwriter and script doctor. Most of his screenplays are written in collaboration with Ben Garant. 

Their films have earned over $1.4 billion at the worldwide box office. Considering one of those movies is Herbie Fully Loaded, 1.4 Billion is even more impressive.

In 2011, Garant and Lennon released a book about writing for film called Writing Movies for Fun and Profit: How We Made a Billion Dollars at The Box Office and You Can Too