Cher biopic produced by 'Mamma Mia!' team By Bang Showbiz Share Cher has confirmed that a film about her life is in the works with Judy Cramer and Gary Goetzman, the team behind âMamma Mia!â, producing the flick. The âIf I Could Turn Back Timeâ hitmaker has confirmed a biopic about her life is officially in the works with Universal, as she revealed Judy Cramer and Gary Goetzman - who are behind âMamma Mia!â and its sequel âMamma Mia! Here We Go Againâ - are set to produce the movie. Eric Roth, Oscar winner, will pen the script, it was confirmed to Variety, and he is behind some of the biggest movies including âForrest Gumpâ and 'A Star Is Born'.