Donna Sheridan-Carmichael (née Sheridan; b. between 1959 and 1961 - d. 2004[1][2]) is the central character of the stage musical Mamma Mia! and its the film adaption the 2008 film of the same name. She also appears in its sequel, Mamma Mia! Here We Go Again. Donna Sheridan-Carmichael (née Sheridan; b. between 1959 and 1961 - d. 2004[1][2]) is the central character of the stage musical Mamma Mia! and its the film adaption the 2008 film of the same name. She also appears in its sequel, Mamma Mia!