Washington DC, April 29 -- Terrence Howard was almost onboard for the biopic of legendary R&B singer Marvin Gaye, but backed out at the last minute after discovering the fact that the singer was 'gay', reported Variety.

During a recent appearance on Bill Maher's 'Club Random' podcast, as quoted by Variety, Howard recalled his 'biggest mistake' of his career when he turned down a starring role in a singer Smokey Robinson biopic for Marvin Gaye's biographical movie.

According to Variety, Howard said that he turned Robinson down because he was already in "conversation with Lee Daniels about playing Marvin Gaye" in a different biopic.

Despite the support from Robinson and others for the biopic of Gaye, the actor eventually passed on the pr...