Believe It or Not ( song ) - wikipedia Believe It or Not ( song ) `` Believe It or Not '' Single by Joey Scarbury from the album America 's Greatest Hero B - side `` Little Bit of Us '' Released 1981 Format 7 '' Length 3 : 11 Label Elektra Songwriter ( s ) Mike Post, Stephen Geyer Producer ( s ) Mike Post Joey Scarbury singles chronology `` Believe It or Not '' ( 1981 ) `` When She Dances '' ( 1981 ) `` Believe It or Not '' ( 1981 ) `` When She Dances '' ( 1981 ) `` Believe It or Not '' is a song composed by Mike Post ( music ) and Stephen Geyer ( lyrics ) and sung by American singer Joey Scarbury. It serves as the theme song for the television series The Greatest American Hero. The track was later included on Scarbury 's 1981 debut album America 's Greatest Hero. The theme song became a popular hit during the run of The Greatest American Hero. `` Believe It or Not '' debuted in the Top 40 of the Billboard Hot 100 on June 13, 1981, eventually peaking at number 2 during the weeks ending August 15 -- 22, 1981, kept off the top spot by `` Endless Love '' by Diana Ross and Lionel Richie, and spending a total of 18 weeks in the Top 40. On the Adult Contemporary Chart, `` Believe It or Not '' went to number 3. It also peaked at the number 1 position on the Record World Chart. It was also used in the 2009 movie `` Super Capers ''. In popular culture George uses a modified version of this song for his answering machine greeting in the Seinfeld episode The Susie. The following is sung by George to the tune of the refrain : `` Believe it or not, George is n't at home, please leave a message at the beep. I must be out, or I 'd pick up the phone, where could I be ? Believe it or not, I 'm not home. '' In 1982 Glen Campbell covered the song. The song is featured in the 2005 film The 40 - Year - Old Virgin. The Family Guy episode `` Believe It or Not, Joe 's Walking on Air '' is a play on the song 's name. It is also sung by Peter in `` The Man with Two Brians. '' The episode of The Goldbergs `` Snow Day '' features the song. A part of the song is sung by the Dog of Wisdom at the end of the short animated film of the same name. The song was used as the theme song to The Cinema Snob from 2008 -- 2013. The song appears in a 2017 TV commercial for State Farm, starring Aaron Rodgers and Clay Matthews. References Jump up ^ Whitburn, Joel ( 2002 ). Top Adult Contemporary : 1961 - 2001. Record Research. p. 216. Jump up ^ IMDB Trivia for The Greatest American Hero Jump up ^ `` State Farm TV Commercial, ' Together ' Featuring Aaron Rodgers, Clay Matthews ''. Retrieved September 11, 2017. Retrieved from `` https://en.wikipedia.org/w/index.php?title=Believe_It_or_Not_(song)&oldid=801811728 '' Categories : 1981 singles Television theme songs Debut singles Glen Campbell songs The Greatest American Hero 1981 songs Hidden categories : Articles with hAudio microformats Talk About Wikipedia Add links This page was last edited on 22 September 2017, at 00 : 48. Text is available under the Creative Commons Attribution - ShareAlike License ; additional terms may apply. By using this site, you agree to the Terms of Use and Privacy Policy. Wikipedia ® is a registered trademark of the Wikimedia Foundation, Inc., a non-profit organization. About Wikipedia

Question: who wrote the theme song for the greatest american hero
Answer: Mike Post (music) and Stephen Geyer (lyrics)